Tiengo, Cesare, et al. “Anatomo-Radiological Study of the Internal Pudendal Perforator Vessels : Clinical Relevance in Reconstructive Surgery of the Perineal Region”. Italian Journal of Anatomy and Embryology, vol. 116, no. 2, Nov. 2011, p. 184, https://oajournals.fupress.net/index.php/ijae/article/view/4758.