Bhatt, R. D., Sitaula, S., Pradhan, T., Manandhar, T., & Basnet, T. (2018). Risk Factors and Outcome of Patients with Obstetric Anal Sphincter Injuries (OASIS). Journal of BP Koirala Institute of Health Sciences, 1(2), 69–72. https://doi.org/10.3126/jbpkihs.v1i2.22082