1. Note on fixation of the Binkhorst iris clip lens;Worst;Ophthalmologica,1971
2. Perspektiven der Iris-Klipp-Linse und der Irido-Kapsularlinse;Binkhorst;Klin. Monatsbl. Augenheilkd,1972
3. The iridocapsular (two-loop) lens and the iris clip (four-loop) lens in pseudophakia;Binkhorst;Trans. Am. Acad. Ophthalmol. Otolaryngol.,1973
4. Letter dated September 1974;Otter,1977
5. The Worst medallion lens;Drews,1975