Shresta, E., J. Shrestha, G. Shayami, and M. Chaudhary. “The Conjunctival Impression Cytology Between the Diagnosed Cases of Dry Eye and Normal Individuals”. Nepalese Journal of Ophthalmology, vol. 3, no. 1, Feb. 2011, pp. 39-44, doi:10.3126/nepjoph.v3i1.4277.