Babar, Tariq Farooq, Zubair Masud, Nasir Saeed, and Muhammad Daud Khan. “An Analysis of Patients With Chronic Dacryocystitis”. Journal of Postgraduate Medical Institute 18, no. 3 (October 5, 2011). Accessed April 25, 2024. https://www.jpmi.org.pk/index.php/jpmi/article/view/910.