Ibrahim, O., Elmassry, A., Said, A., Abdalla, M., El Hennawi, H., & Osman, I. (2016). Combined femtosecond laser-assisted intracorneal ring segment implantation and corneal collagen cross-linking for correction of keratoconus. Clin Ophthalmol.

Ibrahim, Osama, Ahmed Elmassry, Amr Said, Moones Abdalla, Hazem El Hennawi, and Ihab Osman. "Combined Femtosecond Laser-assisted Intracorneal Ring Segment Implantation and Corneal Collagen Cross-linking for Correction of Keratoconus." Clin Ophthalmol 2016.

Ibrahim, Osama, et al. "Combined Femtosecond Laser-assisted Intracorneal Ring Segment Implantation and Corneal Collagen Cross-linking for Correction of Keratoconus." Clin Ophthalmol 2016.