Pellino, Gianluca, et al. “A Modified Pathway of Perineal Packing in Patients Requiring Surgery for Perineal Fistulas With Extensive Perineal Involvement”. Annali Italiani Di Chirurgia, vol. 86, no. 1, Jan. 2015, pp. 61-65, https://annaliitalianidichirurgia.it/index.php/aic/article/view/312.