1. Raverdino, E.: Bull. Soc. franç. Ophtal. 61, 458–465 (1948).
2. Raverdino, E.: Osped. Maggiore 62, 489–496 (1954); ref. Zbl. Ophthal. 65, 165 (1955).
3. Taliercio, A., u. G. Gemolotto: Boll. Oculist. 35, 471–478 (1956).
4. Barrio, A. Del: Ann. Oculist. (Paris) 171, 977–998 (1934).
5. Barrio, A. Del: Arch. Soc. oftal. hisp.-amer. 35, 355–374 (1935).