TSAGAAN, Byambasuren; GANBAATAR, Ochirbat; OTGONBAYAR, Azzayaa. Results of the study of pH and organic matter in the surface soil of Ulaanbaatar. Proceedings of the Mongolian Academy of Sciences, [S. l.], v. 61, n. 04, p. 15–22, 2021. DOI: 10.5564/pmas.v61i04.1928. Disponível em: https://test.mongoliajol.info/PMAS/article/view/1928. Acesso em: 27 oct. 2025.