Yadav, Sanjay, et al. “Prevalence of Refractive Error Among Children of Koshi Rural Municipality of Sunsari District: Door-to-Door Screening”. Journal of BP Koirala Institute of Health Sciences, vol. 5, no. 2, Dec. 2022, pp. 42-46, doi:10.3126/jbpkihs.v5i2.49189.