PAI, S. R.; JOSHI, R. K. Distribution of betulinic acid in plant kingdom. Plant Science Today, [S. l.], v. 1, n. 3, p. 103–107, 2014. DOI: 10.14719/pst.2014.1.3.58. Disponível em: https://horizonepublishing.com/journals/index.php/PST/article/view/58. Acesso em: 1 may. 2024.