Shah, S., S. Mohan, M. Rajan, B. John, and V. Badlani. “Our Experience With Athens Protocol - Simultaneous Topo-Guided Photorefractive Keratectomy Followed by Corneal Collagen Cross Linking for Keratoconus”. International Journal of Research in Medical Sciences, vol. 4, no. 7, Jan. 2017, pp. 2639-44, doi:10.18203/2320-6012.ijrms20161924.