Guerra, G., D. Testa, G. Marcuccio, G. D’Errico, M. R. Cianchetta, M. Cinelli, A. Russo, and S. Montagnani. “TIMPs and MMPs Expression in Nasal Polyps”. Italian Journal of Anatomy and Embryology, vol. 117, no. 2, Feb. 2013, p. 87, https://oajournals.fupress.net/index.php/ijae/article/view/4273.