L, E.-A.; L, M.; B, B. Chemical and technological investigation on the isolation of betulin from birch bark. Bulletin of the Institute of Chemistry and Chemical Technology, [S. l.], n. 8, p. 38–41, 2020. DOI: 10.5564/bicct.v0i8.1476. Disponível em: https://www.mongoliajol.info/index.php/BICCT/article/view/1476. Acesso em: 27 apr. 2024.