О, Л. Их номч багш Намсрайн Содном. Scientific transaction of the National University of Mongolia. Physics, [S. l.], v. 10, n. 179, p. 17–22, 2022. DOI: 10.22353/physics.v10i179.337. Disponível em: https://journal.num.edu.mn/physics/article/view/337. Acesso em: 23 nov. 2024.