1. Klingmuller, G., and Reeh, E.: Nagelgrubchen and deren Familiare Haufungen Dei Der Alopecia Areata. Arch. Klin. Exp. Dermat. 201: 574–581, 1955.
2. Lerner, A.B.: Three unusual pigmentary syndrome. Arch. Derm. 83: 17–105, 1961.
3. Demis, J.D., and Weiner, M.A.: Alopecia universatis, onychodystrophy and total vitiligo. Arch. Derm. 88: 195–201, 1963.
4. Sierra, H.G., and Mesa, J.C.: Alopecia, distrofia ungueal y queratodermia palmoplantar congenitas. Medicina Cutanea Year II: 369–372, 1968.
5. Shelley, W.B., and Rawnsley, H.M.: A minogenic alopecia, look of hair associated with arginino succinic aciduria. Lancet 1327–1328, 1965.