Memon, M. N., S. P. Sheikh, W. A. Sheikh, F. N. Memon, and A. K. Narsani. “Dacryo Cysto Rhinostomy With Intubation: Anterior Flap Versus Flap Excision. A Comparative Study”. Journal of Liaquat University of Medical & Health Sciences, vol. 20, no. 02, July 2021, pp. 104-8, http://ojs.lumhs.edu.pk/index.php/jlumhs/article/view/683.