Kharel, R. S., S. Bhatta, G. B. Shrestha, and J. K. Shrestha. “Malignant Transformation of Kissing Nevus- a Rare Entity”. Nepalese Journal of Ophthalmology, vol. 4, no. 2, July 2012, pp. 329-32, doi:10.3126/nepjoph.v4i2.6555.