IMRAN, M.; KHAN, F. M.; BANGASH, I. H.; REHMAN, S. ur. Sacral Agenesis. Journal of Postgraduate Medical Institute, [S. l.], v. 4, n. 1, 2011. Disponível em: https://jpmi.org.pk/index.php/jpmi/article/view/372. Acesso em: 8 apr. 2025.