1. Contact lenses for the difficult to fit patient;Henry;Contact Lens Forum,1989
2. Corneal pathophysiology with contact lens wear;Bruce;Surv. Ophthalmol.,1990
3. Fitting a true aspherical contact lens;Hirst;Contacto,1974
4. Practical concepts of corneal topometry;Wilms;Optician,1977
5. Considerations about the topometry of cornea and contact lens;Wilms;Contacto,1974