1. Birthmarks in infants;Pratt;Arch. Dermat.&Syph,1953
2. Etudes sur les naevi pigmentaires de la peau humaine (mélano-blastomes bénins);Kissmeyer,1927
3. Personal communication (Origin and Development of the Pigmented Nevus;Stegmaier,1957
4. Naevi;Michel,1932
5. Naevi. (Klinik.);Siemens,1932