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Novikov, B., Kharkov National University
Novikov, B. V., Kharkov National Karazin Univ.
Novikov, B. V., Kharkov
Nupo, Nuttawoot, Chiang Mai University
Nykyforchyn, O., Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk
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ISSN: 2415-721X