Research Article
Sergey D. Neverkovich, Irina S. Bubnova, Nikolay N. Kosarenko, Regina G. Sakhieva, Zhanna M. Sizova, Valeria L. Zakharova, Marina G. Sergeeva
EURASIA J Math Sci Tech Ed, Volume 14, Issue 4, pp. 1483-1495
https://doi.org/10.29333/ejmste/83723