Pokharel, S. M., Chaudhary, S., & Chaurasiya, B. (2017). Factors Affecting the Success Rate of External Dacryocystorhinostomy at B. P. Koirala Institute of Health Sciences, Dharan, Nepal. Birat Journal of Health Sciences, 2(2), 196–200. https://doi.org/10.3126/bjhs.v2i2.18526