I. Hussain, S. P. Khan, M. Alam, A. Abbas, and F. A. Khan, “Success Rate Comparison of Nasolacrimal Duct Probing with and without Assistance of Nasal Endoscope in Congenital Nasolacrimal Duct Obstruction”, Pak Armed Forces Med J, vol. 72, no. 2, pp. 608–12, May 2022, doi: 10.51253/pafmj.v72i2.4116.