IMANBAYEVA, A. Содержание 3 (42) 2012. Recent Contributions to Physics, [S. l.], v. 42, n. 3, p. 91–92, 2012. Disponível em: https://bph.kaznu.kz/index.php/zhuzhu/article/view/883. Acesso em: 6 дек. 2025.