Marks, VLally, SEShields, CL2020-04-102020-04-102019-11Marks V, Lally SE, Shields CL. A simple pingueculum or not?. Indian Journal of Ophthalmology. 2019 Nov; 67(11): 17920301-47381998-3689http://imsear.searo.who.int/handle/123456789/197612Journal ArticleIndiaWills Eye Hospital, Philadelphia, PA, USA