Awoyesuku, Elizabeth, and Ireju Chukwuka. “Demographics and Referral Pattern of Patients With Glaucoma at a Tertiary Eye Hospital in Port Harcourt, Nigeria”. Ophthalmology Research: An International Journal 10, no. 2 (May 8, 2019): 1-7. Accessed August 3, 2020. https://journalor.com/index.php/OR/article/view/30101.