Research Article
Vyacheslav V. Utemov, Laysan A. Ribakova, Olga A. Kalugina, Elena V. Slepneva, Valeria L. Zakharova, Asiya M. Belyalova, Raisa I. Platonova
EURASIA J Math Sci Tech Ed, Volume 16, Issue 10, Article No: em1887
https://doi.org/10.29333/ejmste/8478