Hoque, A. M. ., and S. . Buckus. “Incidence and Risk Factors of Perineal Tears of Pregnant Women Delivering at a Midwife Obstetric Unit South Africa”. Nepal Journal of Obstetrics and Gynaecology, vol. 16, no. 2, Jan. 2022, pp. 60-68, https://nepjol.info/index.php/NJOG/article/view/42102.