Tuscano, Domenico, et al. “Surgical Approach to Piles at Risk of Severe Postoperative Pain: Tricks and Tips”. Annali Italiani Di Chirurgia, vol. 88, no. 5, Sept. 2017, pp. 454-8, https://annaliitalianidichirurgia.it/index.php/aic/article/view/1571.