Chhabra, Hema, Anita Gupta, and Gursatinder Singh. 2017. “A Comparative Study of Benzalkonium Chloride-Free Latanoprost Versus Benzalkonium Chloride-Preserved Latanoprost on Ocular Surface Health in Patients of Primary Open Angle Glaucoma”. International Journal of Basic & Clinical Pharmacology 6 (5):1110-14. https://doi.org/10.18203/2319-2003.ijbcp20171660.