Zuccon, W., M. Faccini, P. Caputo, D. Gavezzoli, A. Manelli, and L. Bonandrini. 2001. “HEMORROIDAL DISEASE: EPIDEMIOLOGY AND CORRELATION WITH CHRONIC CONSTIPATION”. Annali Italiani Di Chirurgia 72 (3):337-40. https://annaliitalianidichirurgia.it/index.php/aic/article/view/813.