1. Ehlers N Andersen J 1990 Excimer-cornea interaction, principles of the photoablation
2. Operation of dosaged dissection of corneal circular ligament in cases of myopia of mild degree;Fyodorov;Ann Ophthalmol,1979
3. Epikeratophakia for high myopia;Hjortdal;Acta Ophthalmol (Copenh),1991
4. Polysulfone intracor-neal lenses;Lane;Int Ophthalmol Clin,1991