1. Keratoconus: an analysis of the factors which influence the optical results of keratoplasty. Paper read at European Contact Lens;Davies, P.D.Ruben; M.; Woodward, E.G.;Society of Ophthalmologists Symposium, Ghent,1977
2. Ruben, M. (1972). Contact lens and keratoplasty curvatures. In Corneal Grafting, pp. 244-280. Edited by T. A. Casey. Butterworth: London.
3. Astigmatism and myopia in keratoconus;Troutman, R.C.; Meltzer, M.;Transactions of the American Ophthalmological Society,1972
4. Astigmatism and myopia in keratoplasty;Troutman, R.C.;South African Archives of Ophthalmology,1973