%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% The following are alphabetized by the first authors last name.  %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

@article {Akers-Krishnamurthy,
    AUTHOR = {Akers, Sheldon B. and Krishnamurthy, Balakrishnan},
     TITLE = {A group-theoretic model for symmetric interconnection
              networks},
   JOURNAL = {IEEE Trans. Comput.},
  FJOURNAL = {Institute of Electrical and Electronics Engineers.
              Transactions on Computers},
    VOLUME = {38},
      YEAR = {1989},
    NUMBER = {4},
     PAGES = {555--566},
      ISSN = {0018-9340},
     CODEN = {ITCOB4},
   MRCLASS = {68R10 (20F32 68M10 68Q35)},
  MRNUMBER = {MR984680 (89k:68115)},
}

@Article{Alon,
  author = 	 {Alon, N.},
  title = 	 {Eigenvalues and expanders},
  journal = 	 {Combinatorica},
  year = 	 {1986},
  volume = 	 {6},
  number = 	 {2}
}

@incollection {Alon-Lubotzky-Wigderson,
    AUTHOR = {Alon, N. and Lubotzky, A. and Wigderson, A.},
     TITLE = {Semi-direct product in groups and zig-zag product in graphs:
              connections and applications (extended abstract)},
 BOOKTITLE = {42nd {IEEE} {S}ymposium on {F}oundations of {C}omputer
              {S}cience ({L}as {V}egas, {NV}, 2001)},
     PAGES = {630--637},
 PUBLISHER = {IEEE Computer Soc., Los Alamitos, CA},
      YEAR = {2001},
   MRCLASS = {20E22 (05C25 68R10)},
  MRNUMBER = {MR1948752},
}

@Article{Alon-Milman,
  author = 	 {Alon, N. and Milman, V.D.},
  title = 	 {$\lambda_1$, Isoperimetric Inequalities for Graphs, and Superconcentrators},
  journal = 	 {Journal of Combinatorial Theory, Series B},
  year = 	 {1985},
  volume = 	 {38},
  OPTnumber = 	 {},
  pages = 	 {73--88}
}

@Article{Alon-Roichman,
  author = 	 {Alon, N. and Roichman, Y.},
  title = 	 {Random {C}ayley Graphs and Expanders},
  journal = 	 {Random Structures and Algorithms},
  year = 	 {1994},
  volume = 	 {5},
  number = 	 {2},
  pages = 	 {271--284}
}

@article {Alon-Schwartz-Shapira,
    AUTHOR = {Alon, N. and Schwartz, O. and Shapira, A.},
     TITLE = {An elementary construction of constant-degree expanders},
   JOURNAL = {Combin. Probab. Comput.},
  FJOURNAL = {Combinatorics, Probability and Computing},
    VOLUME = {17},
      YEAR = {2008},
    NUMBER = {3},
     PAGES = {319--327},
      ISSN = {0963-5483},
   MRCLASS = {05C07 (05C50 68R10)},
  MRNUMBER = {MR2410389 (2009b:05070)},
MRREVIEWER = {Sebastian M. Cioab{\u{a}}},
}

@Article{Babai,
  author =   {Babai, L.},
  title =    {Spectra of {C}ayley Graphs},
  journal =      {Journal of Combinatorial Theory, Series B},
  year =     {1979},
  volume =   {27},
  OPTnumber =    {},
  pages =    {180--189}
}

@Article{Bacher-DeLaHarpe,
  author =   {Bacher, R. and De La Harpe, P.},
  title =    {Exact Values of {K}azhdan Constants for Some Finite Groups},
  journal =      {Journal of Algebra},
  year =     {1994},
  volume =   {163},
  pages =    {495--515}
}

@Book{Bateman-Diamond,
  author =   {Bateman, P. and Diamond, H.},
  title =    {Analytic Number Theory, An Introductory Course},
  publisher =    {World Scientific},
  year =     {2004}
}

@Article{Bien,
  author = 	 {Bien, F.},
  title = 	 {Constructions of telephone networks by group representations},
  journal = 	 {Notices of the A.M.S.},
  year = 	 {1989},
  volume = 	 {36},
  number = 	 {1},
  pages = 	 {5 -- 22}
}

@Book{Biggs,
  author = 	 {Biggs, N.},
  title = 	 {Algebraic Graph Theory},
  publisher = 	 {Cambridge University Press},
  year = 	 {1993},
  edition = 	 {second}
}

@Article{BroderShamir,
  author = 	 {Broder, A. and Shamir, E.},
  title = 	 {On the Second Eigenvalue of Random Regular Graphs},
  journal = 	 {18th Annual Symposium on Foundations of Computer Science},
  year = 	 {1987},
  pages = 	 {286--294}
}

@Article{Chiu,
  author = 	 {Chiu, P.},
  title = 	 {Cubic {R}amanujan Graphs},
  journal = 	 {Combinatrica},
  year = 	 {1992},
  volume = 	 {12},
  pages = 	 {275--285}
}

@Article{Chung,
  author = 	 {Chung, F.R.K.},
  title = 	 {Diameters and Eigenvalues},
  journal = 	 {Journal of the American Mathematical Society},
  year = 	 {1989},
  volume = 	 {2},
  number = 	 {2},
  pages = 	 {187--196}
}

@Book{Chung-book,
  author = 	 {Chung, F.R.K},
  title = 	 {Spectral Graph Theory},
  publisher = 	 {American Mathematical Society},
  year = 	 {1997},
  number = 	 {92},
  series = 	 {Regional Conference Series in Mathematics}
}

@phdthesis{Cioaba_thesis,
Author = {Cioab\u{a}, S.},
Title = {Eigenvalues of Expander Graphs},
School = {Queen’s University},
Year = {2005},
Type = {Ph.D. Thesis},
}

@Article{Cioaba,
  author =   {Cioab\u{a}, S.},
  title =    {Closed Walks and Eigenvalues of Abelian {C}ayley Graphs },
  journal =      {Comptes Rendus Mathematique},
  year =     {2006},
  volume =   {342},
  number =   {9},
  pages =    {635--638}
}

@Book{DavisSigalWeyuker,
  author = 	 {Davis, M. and Sigal, R. and Weyuker, E.},
  title = 	 {Computability, Complexity, and Languages: Fundamentals of Theoretical Computer Science},
  publisher = 	 {Academic Press},
  year = 	 {1994},
  series = 	 {Computer Science and Scientific Computing},
  edition = 	 {second}
}

@Article{Dedeo,
  author = 	 {Dedeo, M. and Lanphier, D. and Minei, M.},
  title = 	 {The Spectrum of Platonic Graphs over Finite Fields},
  journal = 	 {Discrete Mathematics},
  year = 	 {2007},
  volume = 	 {307},
  pages = 	 {1074--1081}
}

@Misc{Derbidge,
  author = 	 {Derbidge, J.},
  title = 	 {Kazhdan constants of cyclic groups},
  howpublished = {Master's thesis, California State University, Los Angeles},
  month = 	 {Los Angeles},
  year = 	 {2010}
}


@Article{Dodziuk,
  author = 	 {Dodziuk, J.},
  title = 	 {Difference equations, isoperimetric inequality and transience of certain random walks},
  journal = 	 {Trans. Amer. Math. Soc.},
  year = 	 {1984},
  volume = 	 {284},
  number = 	 {2},
  pages = 	 {787--794}
}

@Book{DSV,
  author = 	 {Davidoff, G. and Sarnak, P. and Valette, A.},
  title = 	 {Elementary Number Theory, Group Theory, and {R}amanujan Graphs},
  publisher = 	 {Cambridge University Press},
  year = 	 {2003},
  number = 	 {55},
  series = 	 {London Mathematical Society, Student Texts}
}

@Article{Elspas-Turner,
  author = 	 {Elspas, B. and Turner, J.},
  title = 	 {Graphs with circulant adjacency matrices},
  journal = 	 {J. Combin. Theory},
  year = 	 {1970},
  volume = 	 {9},
  pages = 	 {297=-307}
}

@Article{Erdos,
  author = 	 {Erd\"{o}s, P.},
  title = 	 {Graph Theory and Probability},
  journal = 	 {Can. J. Math.},
  year = 	 {1959},
  volume = 	 {11},
  pages = 	 {34--38}
}

@Article{Friedman,
  author = 	 {Friedman, J.},
  title = 	 {On the Second Eigenvalue and Random Walks in Random d-Regular Graphs},
  journal = 	 {Combinatorica},
  year = 	 {1991},
  volume = 	 {11},
  pages = 	 {331--362}
}

@Article{Friedman2,
  author = 	 {Friedman, J.},
  title = 	 {A Proof of {A}lon's Second Eigenvalue Conjecture and Related Problems},
  journal = 	 {Memoirs of the American Mathematical Society},
  year = 	 {2008},
  volume = 	 {195},
  number = 	 {910},
  month = 	 {September}
}

@Article{Friedman-Murty-Tillich,
  author =   {Friedman, J. and Murty, R. and Tillich, J.},
  title =    {Spectral Estimates for Abelian {C}ayley Graphs},
  journal =      {Journal of Combinatorial Theory, Series B},
  year =     {2006},
  OPTkey =   {},
  volume =   {96},
  OPTnumber =    {},
  pages =    {111-121},
  OPTmonth =     {},
  OPTnote =      {},
  OPTannote =    {}
}

@Book{Friedberg-Insel-Spence,
  author =   {Friedberg, S. and Insel, A. and Spence, L.},
  title =    {Linear Algebra},
  publisher =    {Prentice Hall},
  year =     {1997},
  edition =      {third}
}

@article {Fris-Havel-Liebl,
    AUTHOR = {Fri{\v{s}}, Ivan and Havel, Ivan and Liebl, Petr},
     TITLE = {The diameter of the cube-connected cycles},
   JOURNAL = {Inform. Process. Lett.},
  FJOURNAL = {Information Processing Letters},
    VOLUME = {61},
      YEAR = {1997},
    NUMBER = {3},
     PAGES = {157--160},
      ISSN = {0020-0190},
     CODEN = {IFPLAT},
   MRCLASS = {68R10 (05C90)},
  MRNUMBER = {MR1439884},
}

@Book{Fulton-Harris,
  author =   {Fulton, W. and Harris, J.},
  title =    {Representation Theory: A First Course},
  publisher =    {Springer},
  year =     {1991},
  number =   {129},
  series =   {Graduate Texts in Mathematics}
}

@Article{Gabber-Galil,
  author = 	 {Gabber, O. and Galil, Z.},
  title = 	 {Explicit Constructions of Linear-Sized Superconcentrators},
  journal = 	 {Journal of Computer and System Sciences},
  year = 	 {1981},
  volume = 	 {22},
  number = 	 {3},
  pages = 	 {407 -- 420}
}

@Book{Godsil-Royle,
  author = 	 {Godsil, C. and Royle, G.},
  title = 	 {Algebraic Graph Theory},
  publisher = 	 {Springer},
  year = 	 {2001},
  number = 	 {207},
  series = 	 {Graduate Texts in Mathematics}
}

@Article{Hoory-Linial-Wigderson,
  author = 	 {Hoory, S. and Linial, N. and Wigderson, A.},
  title = 	 {Expander graphs and their applications},
  journal = 	 {Bull. Amer. Math. Soc.},
  year = 	 {2006},
  volume = 	 {43},
  number =       {4},
  pages = 	 {439--561}
}

@Book{Ireland-Rosen,
  author =   {Ireland, K. and Rosen, M.},
  title =    {A Classical Introduction to Modern Number Theory},
  publisher =    {Springer},
  year =     {1990},
  number =   {84},
  series =   {Graduate Texts in Mathematics},
  edition =      {second}
}

@Article{Jimbo-Maruoka,
  author = 	 {Jimbo, S. and Maruoka, A.},
  title = 	 {Expanders Obtained from Affine Transformations},
  journal = 	 {Combinatorica},
  year = 	 {1987},
  volume = 	 {7},
  number = 	 {4},
  pages = 	 {343 -- 355}
}

@article {Kassabov,
    AUTHOR = {Kassabov, M.},
     TITLE = {Symmetric groups and expander graphs},
   JOURNAL = {Invent. Math.},
  FJOURNAL = {Inventiones Mathematicae},
    VOLUME = {170},
      YEAR = {2007},
    NUMBER = {2},
     PAGES = {327--354},
      ISSN = {0020-9910},
     CODEN = {INVMBH},
   MRCLASS = {20B30 (05C25 05E15 20F69)},
  MRNUMBER = {MR2342639},
}

@Article{KLN,
  author = 	 {Kassabov, M. and Lubotzky, A. and Nikolov N.},
  title = 	 {Finite Simple Groups as Expanders},
  journal = 	 {Proceedings of the National Academy of Sciences of the United States of America},
  year = 	 {2006},
  volume = 	 {103},
  number = 	 {16},
  pages = 	 {6116-6119},
  month = 	 {April}
}

@Article{Katz,
  author =   {Katz, N. M.},
  title =    {An Estimate for Character Sums},
  journal =      {Journal of the American Mathematical Society},
  year =     {1989},
  volume =   {2},
  pages =    {197--200}
}

@Article{Kotani-Sunada,
  author = 	 {Kotani, M. and Sunada, T.},
  title = 	 {Zeta Functions of Finite Graphs},
  journal = 	 {Journal of Mathematical Sciences, The University of Tokyo },
  year = 	 {2000},
  volume = 	 {7},
  number = 	 {1},
  pages = 	 {7--25}
}

@Book{Krebs-Shaheen,
  author =   {Krebs, M. and Shaheen, A.},
  title =    {Expander Families and {C}ayley Graphs: A Beginner's Guide},
  publisher =    {Oxford University Press},
  year =     {2011}
}

@Article{Landau-Russell,
  author = 	 {Landau, Z. and Russell, A.},
  title = 	 {Random {C}ayley Graphs are Expanders: a Simple Proof of the {A}lon-{R}oichman Theorem},
  journal = 	 {The Electronic Journal of Combinatorics},
  year = 	 {2004},
  volume = 	 {11},
  number = 	 {R62}
}

@Article{LanphierRosenhouse,
  author = 	 {Lanphier, D. and Rosenhouse, J.},
  title = 	 {Cheeger Constants of Platonic Graphs},
  journal = 	 {},
  year = 	 {},
  OPTkey = 	 {},
  OPTvolume = 	 {},
  OPTnumber = 	 {},
  OPTpages = 	 {},
  OPTmonth = 	 {},
  note = 	 {to appear in Discrete Mathematics},
  OPTannote = 	 {}
}

@Book{Ledermann,
  author =   {Ledermann, W.},
  title =    {Introduction to Group Characters},
  publisher =    {Cambridge University Press},
  year =     {1977}
}

@Article{Loh-Schulman,
  author = 	 {Loh, P. and Schulman, L.},
  title = 	 {Improved Expansion of Random {C}ayley Graphs},
  journal = 	 {Discrete Mathematics and Theoretical Computer Science},
  year = 	 {2004},
  volume = 	 {6},
  OPTnumber = 	 {},
  pages = 	 {523 -- 528}
}

@Book{Lubotzky,
  author =   {Lubotzky, A.},
  title =    {Discrete Groups, Expanding Graphs, and Invariant Measures},
  publisher =    {Birkhauser Verlag},
  year =     {1994},
  volume =   {125},
  series =    {Progress in Mathematics}
}

@Article{LPS,
  author = 	 {Lubotzky, A. and Phillips, R. and Sarnak, P.},
  title = 	 {Ramanujan Graphs},
  journal = 	 {Combinatorica},
  year = 	 {1988},
  volume = 	 {8},
  number = 	 {3},
  pages = 	 {261--277}
}

@InCollection{Lubotzky-Weiss,
  author =   {Lubotzky, A. and Weiss, B.},
  title =    {Groups and Expanders},
  booktitle =    {Expanding Graphs},
  pages =    {95--109},
  publisher =    {American Mathematical Society},
  year =     {1993},
  volume =   {10},
  series =   {DIMACS Series in Discrete Mathematics and Theoretical Computer Science}
}

@Article{Margulis,
  author = 	 {Margulis, G. A.},
  title = 	 {Explicit Group-Theoretical Constructions of Combinatorial Schemes and Their Application to the
                  Design of Expanders and Concentrators},
  journal = 	 {Problems of Information Transmission},
  year = 	 {1988},
  volume = 	 {24},
  number = 	 {1},
  pages = 	 {39--46}
}

@Article{Margulis2,
  author = 	 {Margulis, G. A.},
  title = 	 {Explicit Constructions of Concentrators},
  journal = 	 {Problems of Information Transmission},
  year = 	 {1975},
  volume = 	 {9},
  pages = 	 {325 -- 332}
}

@article {Margulis73,
    AUTHOR = {Margulis, G. A.},
     TITLE = {Explicit constructions of expanders},
   JOURNAL = {Problemy Pereda\v ci Informacii},
  FJOURNAL = {Akademiya Nauk SSSR. Institut Problem Peredachi Informatsii
              Akademii Nauk SSSR. Problemy Peredachi Informatsii},
    VOLUME = {9},
      YEAR = {1973},
    NUMBER = {4},
     PAGES = {71--80},
      ISSN = {0555-2923},
   MRCLASS = {94A15 (22E45)},
  MRNUMBER = {MR0484767 (58 \#4643)},
MRREVIEWER = {J. S. Joel},
}

@article {Meshulam-Wigderson,
    AUTHOR = {Meshulam, R. and Wigderson, A.},
     TITLE = {Expanders in group algebras},
   JOURNAL = {Combinatorica},
  FJOURNAL = {Combinatorica. An International Journal on Combinatorics and
              the Theory of Computing},
    VOLUME = {24},
      YEAR = {2004},
    NUMBER = {4},
     PAGES = {659--680},
      ISSN = {0209-9683},
   MRCLASS = {05C25 (20C15)},
  MRNUMBER = {MR2096820 (2005m:05114)},
MRREVIEWER = {Gary L. Walls},
}

@Article{Mohar,
  author = 	 {Mohar, B.},
  title = 	 {Eigenvalues, Diameter, and Mean Distance in Graphs},
  journal = 	 {Graphs and Combinatorics},
  year = 	 {1991},
  volume = 	 {7},
  number = 	 {1},
  pages = 	 {53--64}
}

@Article{Mohar2,
  author = 	 {Mohar, B.},
  title = 	 {Isoperimetric Numbers of Graphs},
  journal = 	 {Journal of Combinatorial Theory, Series B},
  year = 	 {1989},
  volume = 	 {47},
  pages = 	 {274--291}
}

@Article{Morgenstern,
  author = 	 {Morgenstern, M.},
  title = 	 {Existence and Explicit Constructions of $q+1$ regular {R}amanujan Graphs for Every Prime Power $q$},
  journal = 	 {J. Comb. Theory, Ser. B},
  year = 	 {1994},
  volume = 	 {62},
  pages = 	 {44--62}
}

@article {Murty,
    AUTHOR = {Murty, M. Ram},
     TITLE = {Ramanujan graphs},
   JOURNAL = {J. Ramanujan Math. Soc.},
  FJOURNAL = {Journal of the Ramanujan Mathematical Society},
    VOLUME = {18},
      YEAR = {2003},
    NUMBER = {1},
     PAGES = {33--52},
      ISSN = {0970-1249},
   MRCLASS = {11M41 (05C50 11M36)},
  MRNUMBER = {MR1966527 (2004d:11092)},
MRREVIEWER = {Thomas R. Shemanske},
}

@Book{Nathanson,
  author =   {Nathanson, M.},
  title =    {Elementary Methods in Number Theory},
  publisher =    {Springer},
  year =     {2000},
  number =   {195},
  series =   {Graduate Texts in Mathematics}
}

@Article{Nilli,
  author = 	 {Nilli, A.},
  title = 	 {On the second eigenvalue of a graph},
  journal = 	 {Discrete Math.},
  year = 	 {1991},
  number = 	 {91},
  pages = 	 {207--210}
}

@Book{Niven-Montgomery-Zuckerman,
  author = 	 {Niven, I. and Montgomery, H. and Zuckerman, H.},
  title = 	 {An Introduction to the Theory of Numbers},
  publisher = 	 {John Wiley and Sons},
  year = 	 {1991},
  edition = 	 {fifth}
}

@article {Pak-Zuk,
    AUTHOR = {Pak, I. and {\.Z}uk, A.},
     TITLE = {On {K}azhdan constants and mixing of random walks},
   JOURNAL = {Int. Math. Res. Not.},
  FJOURNAL = {International Mathematics Research Notices},
      YEAR = {2002},
    NUMBER = {36},
     PAGES = {1891--1905},
      ISSN = {1073-7928},
   MRCLASS = {20F65 (20P05 60G50)},
  MRNUMBER = {MR1920168 (2003i:20072)},
MRREVIEWER = {Alexander Gamburd},
}

@article {Reingold-Vadhan-Wigderson,
    AUTHOR = {Reingold, O. and Vadhan, S. and Wigderson, A.},
     TITLE = {Entropy waves, the zig-zag graph product, and new
              constant-degree expanders},
   JOURNAL = {Ann. of Math. (2)},
  FJOURNAL = {Annals of Mathematics. Second Series},
    VOLUME = {155},
      YEAR = {2002},
    NUMBER = {1},
     PAGES = {157--187},
      ISSN = {0003-486X},
     CODEN = {ANMAAH},
   MRCLASS = {05C50 (60C05)},
  MRNUMBER = {MR1888797 (2003c:05145)},
MRREVIEWER = {Sandi Klav{\v{z}}ar},
}

@Article{Rosenhouse,
  author = 	 {Rosenhouse, J.},
  title = 	 {Isoperimetric Numbers of {C}ayley Graphs Arising from Generalized Dihedral Groups},
  journal = 	 {The Journal of Combinatorial Mathematics and Combinatorial Computing},
  year = 	 {2002},
  volume = 	 {42},
  pages = 	 {127--138},
  month = 	 {August}
}

@article {Rozenman-Shalev-Wigderson,
    AUTHOR = {Rozenman, E. and Shalev, A. and Wigderson, A.},
     TITLE = {Iterative construction of {C}ayley expander graphs},
   JOURNAL = {Theory Comput.},
  FJOURNAL = {Theory of Computing. An Open Access Journal},
    VOLUME = {2},
      YEAR = {2006},
     PAGES = {91--120},
      ISSN = {1557-2862},
   MRCLASS = {05C25 (68R10)},
  MRNUMBER = {MR2322872 (2009b:05133)},
MRREVIEWER = {Sebastian M. Cioab{\u{a}}},
}
@Book{Sagan,
  author =   {Sagan, B.},
  title =    {The Symmetric Group: Representations, Combinatorial Algorithms, and Symmetric Functions},
  publisher =    {Springer},
  year =     {2001},
  number =   {203},
  series =   {Graduate Texts in Mathematics},
  edition =      {Second}
}

@InCollection{Schellwat,
  author =   {Schellwat, H.},
  title =    {Highly Expanding Graphs Obtained from Dihedral Groups},
  booktitle =    {Expanding Graphs},
  pages =    {117--123},
  publisher =    {American Mathematical Society},
  year =     {1993},
  volume =   {10},
  series =   {DIMACS Series in Discrete Mathematics and Theoretical Computer Science}
}

@Book{Serre,
  author =   {Serre, J.},
  title =    {Linear Representations of Finite Groups},
  publisher =    {Springer},
  year =     {1977},
  number =   {42},
  series =   {Graduate Texts in Mathematics}
}

@book {Terras-book,
    AUTHOR = {Terras, A.},
     TITLE = {Fourier analysis on finite groups and applications},
    SERIES = {London Mathematical Society Student Texts},
    VOLUME = {43},
 PUBLISHER = {Cambridge University Press},
   ADDRESS = {Cambridge},
      YEAR = {1999},
     PAGES = {x+442},
      ISBN = {0-521-45718-1},
   MRCLASS = {11-02 (11T60 11Z05 20C15 43-01)},
  MRNUMBER = {MR1695775 (2000d:11003)},
MRREVIEWER = {Stefan K{\"u}hnlein}
}

@Article{Terras-Stark-1,
  author = 	 {Terras, A. and Stark, H.},
  title = 	 {Zeta Functions of Finite Graphs and Coverings},
  journal = 	 {Advances in Mathematics},
  year = 	 {1996},
  volume = 	 {121},
  pages = 	 {124--165}
}

@Article{Terras-Stark-2,
  author = 	 {Terras, A. and Stark, H.},
  title = 	 {Zeta Functions of Finite Graphs and Coverings, Part II},
  journal = 	 {Advances in Mathematics},
  year = 	 {2000},
  volume = 	 {154},
  pages = 	 {132--195}
}

@Article{Terras-Stark-3,
  author = 	 {Terras, A. and Stark, H.},
  title = 	 {Zeta Functions of Finite Graphs and Coverings, Part III},
  journal = 	 {Advances in Mathematics},
  year = 	 {2007},
  volume = 	 {208},
  pages = 	 {467--489}
}


@Misc{Xiao,
  author = 	 {Xiao, D.},
  title = 	 {The Evolution of Expander Graphs},
  howpublished = {Honor's Thesis, http://www.hcs.harvard.edu/thesis/repo/32/},
  month = 	 {April},
  year = 	 {2003}
}