JARGALSAIKHAN, M. Comprehensive Study of Environmental Radioactivity. Scientific transaction of the National University of Mongolia. Physics, [S. l.], v. 38, n. 621, p. 18–27, 2025. DOI: 10.22353/physics.v38i621.10091. Disponível em: https://journal.num.edu.mn/physics/article/view/10091. Acesso em: 5 dec. 2025.