1. Genetics and Dentistry;Witkop;Eugenics Quart,1958
2. Dentin and Enamel Anomalies;Witkop,1962
3. Anomalies of Human Dentine;Rushton;Br. Dent. J,1955
4. Pathology of the Dental Hard Tissues;Pindborg,1970
5. Dentin and Enamel Anomalies: Histologic Observations;Hals,1962