IMANBAYEVA, A. Содержание 2 (37) 2011. Recent Contributions to Physics, [S. l.], v. 2011, n. 2, p. 105, 2017. Disponível em: https://bph.kaznu.kz/index.php/zhuzhu/article/view/987. Acesso em: 15 дек. 2025.