V.I. Istomin1, S.E. Tverskaya2
1Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28
E-mail: v-istomina@mail.ru
2Sevastopol State University, RF, Sevastopol, Universitetskaya St., 33
E-mail: svettverskaya@mail.ru
DOI: 10.33075/2220-5861-2021-4-63-70