1. Keratoconus posticus.;Butler;Tr. Ophth. Soc. U. Kingdom,1930
2. Discussion on the “rarer forms of keratitis.”;Butler;Tr. Ophth. Soc. U. Kingdom,1937
3. Keratoconus posticus.;Ingram;Tr. Ophth. Soc. U. Kingdom,1936
4. Keratoconus posticus generalis.;Ross;Am. J. Ophth.,1950
5. Su di un casotic choratocono posteriore.;DeRosa;Arch. Ophtal.,1959