K. A. AL-TAEE, G.; D. S. AL-SHAMA, S. Changing in Collagen Protein Due to Aging. College of Basic Education Research Journal, [S. l.], v. 12, n. 1, p. 716–732, 2013. Disponível em: https://stats.uomosul.edu.iq/index.php/berj/article/view/38939. Acesso em: 26 oct. 2025.