1. Contact Lens Correction;Bier,1977
2. Toric contact lens fitting;Westerhout,1981
3. The manufacture of rigid gas-permeable lens materials;Ratkowski,1986
4. Toric periphery rigid lenses;Edwards;J. Br. Contact Lens Assoc.,1994
5. Physical constants of polymethyl methacrylate;Wunderlich,1989