A.S. Mazinov1, N.A. Boldyrev2, A.A. Marendich3, A.V. Starosek4

1–4 V.I. Vernadsky Crimean Federal University (Republic of Crimea, Simferopol, Russia)

1mazinovas@cfuv.ru, 2kolyaboldyrev@gmail.com, 3marendic0111@gmail.com, 4starosekav@cfuv.ru