Agarwal, D. S., Arora, R. and Upadhyay, S. (2020) “External dacryocystorhinostomy for patients of chronic dacryocystitis with chronic rhinosinusitis”, Tropical Journal of Ophthalmology and Otolaryngology, 5(3), pp. 72-77. doi: 10.17511/jooo.2020.i03.03.