AVWIORO, O. G.; ALOAMAKA, P. C.; OJIANYA, N. U.; ODUOLA, T.; EKPO, E. O. Extracts of Pterocarpus osun as a histological stain for collagen fibres. African Journal of Biotechnology, [S. l.], v. 4, n. 5, p. 460–462, 2005. DOI: 10.4314/ajb.v4i5.15122. Disponível em: https://www.ajol.info/index.php/ajb/article/view/15122. Acesso em: 25 sep. 2026.