1. Barraquer's overall concept and surgical approach to refractive surgery;Boyd,1987
2. Hexagonal keratetomy-should we still be trying?;Werblin;J Refract Surg,1996
3. Hyperopic thermokeratoplasty: clinical evaluation;Neumann;J Cataract Refract Surg,1991
4. Corneal topographic changes after noncontact holmium:YAG laser thermal keratoplasty to correct hyperopia;Kohnen T Husain;J Cataract Refract Surg,1996
5. Excimer laser photorefractive keratectomy for hyperopia;Dausch;Refract Corneal Surg,1993