1. Thirty years of corneal contacts!;Knoll;Contact Lens Forum,1976
2. Corneal contact lenses in traumatic unilateral aphakia;May;Can J Ophthalmol,1968
3. Correction of aphakia with corneal contact lenses;Cassady;Am J Ophthalmol,1969
4. Die Frage der Bewahrung der Kentaktlinsen bei unilateraler Aphakic;Gyöffy;Klin Monatsbl Augenheilkd,1972
5. Unilateral aphakia and corneal contact lenses;Dixon;Can J Ophthalmol,1973