ACHARYA, K. ., B. . PRADHAN, N. . THAPA, and S. . KHANAL. “COMPARISON OF OUTCOME FOLLOWING ENDOSCOPIC DACRYOCYSTORHINOSTOMY WITH EXTERNAL DACRYOCYSTORHINOSTOMY”. Nepalese Journal of ENT Head &Amp; Neck Surgery, vol. 2, no. 2, Jan. 2012, pp. 2-3, https://www.njehns.org.np/index.php/njehns/article/view/46.