Krishnan, P., S. Kuriachan, and N. Sethuraman. “A Prospective Study on the Effect of Topical Lidocaine Gel Versus Drops on Ocular Pain in Manual Small Incision Cataract Surgery”. International Journal of Basic & Clinical Pharmacology, vol. 7, no. 7, June 2018, pp. 1253-6, doi:10.18203/2319-2003.ijbcp20182513.