Rai, S. K., H. Thapa, M. Sharma, K. Dhakhwa, and R. Karki. “The Distribution of Refractive Errors Among Children Attending Lumbini Eye Institute, Nepal”. Nepalese Journal of Ophthalmology, vol. 4, no. 1, Feb. 2012, pp. 90-95, doi:10.3126/nepjoph.v4i1.5858.