Rizvi, Syed, Mohammad Saquib, Yogesh Gupta, Rakesh Maheshwari, and Puneet Maheshwari. “Functional Outcome in Primary Nasolacrimal Duct Obstruction After Successful External Dacryocystorhinostomy Surgery”. Asian Journal of Ophthalmology 15, no. 3 (March 30, 2017). Accessed December 22, 2024. https://www.asianjo.com/index.php/AsianJO/article/view/262.