1. Contact Lens Acuity in Keratoconus Keratoplasty;Ruben;International Contact Lens Clinic,1975
2. Keratoconus, Keratoplasty curvatures and contact lens wear;Ruben;British Journal of Ophthalmology,1979
3. Treatment of Keratoconus;Ruben;Australian Journal of Optometry,1979
4. Keratoplasty Sensitivity;Ruben;British Journal of Ophthalmology,1979