GALAIKO, N.V. CYTOTOXIC ACTIVITY OF HETEROCYCLIC DERIVATIVES OF BETULIN. Perm Federal Research Centre Journal, [S. l.], n. 2, p. 20–23, 2015. Disponível em: https://journal.permsc.ru/index.php/pscj/article/view/PSCJ2015n2p4. Acesso em: 13 may. 2026.