Santoso, Budi I, and Denny Khusen. “The Incidence of Anal Sphincter Ruptures and Risk Factors”. Indonesian Journal of Obstetrics and Gynecology 4, no. 1 (January 14, 2016): 31–36. Accessed May 1, 2026. https://inajog.com/index.php/journal/article/view/69.