O. I. Dotsenko https://orcid.org/0000-0003-3946-3515 Vasyl’ Stus Donetsk National University Ukraine
G. V. Taradina https://orcid.org/0000-0001-8931-8370 Vasyl’ Stus Donetsk National University Ukraine
A. M. Mischenko https://orcid.org/0000-0001-9952-9729 Vasyl’ Stus Donetsk National University Ukraine