Research Article
Gulnara M. Kvon, Vera B. Vaks, Aydar M. Kalimullin, Almira R. Bayanova, Albina R. Shaidullina, Anzhela V. Dolzhikova, Natalia I. Lapidus
EURASIA J Math Sci Tech Ed, Volume 15, Issue 10, Article No: em1767
https://doi.org/10.29333/ejmste/109503