20. Simon G, Barraquer R, Barraquer E: Refractive remodeling of the cornea by intrastromal rings: ICER, Proceedings of the International Society for Eye Research, 1988, 113,

20. Simon G, Barraquer R, Barraquer E: Refractive remodeling of the cornea by intrastromal rings: ICER, Proceedings of the International Society for Eye Research, 1988, 113,