Sena, Paola, et al. “Quantification and Localization of Matrix Metalloproteinases (MMP15 and MMP19) in Human Colorectal Carcinogenesis”. Italian Journal of Anatomy and Embryology, vol. 116, no. 2, Nov. 2011, p. 170, https://oajournals.fupress.net/index.php/ijae/article/view/4744.