О. ЛХАГВА. Эрдэмд зам заасан багш минь. Scientific transaction of the National University of Mongolia. Physics, [S. l.], v. 13, n. 251, p. 65–67, 2022. DOI: 10.22353/physics.v13i251.207. Disponível em: https://journal.num.edu.mn/physics/article/view/207. Acesso em: 23 nov. 2024.