1. Pre-auricular fistula and aural fistula ear pit;Aird,1949
2. Studien an Zwillingen im Saugling- und Klein-kindesalter;Brauns;Zeitschrift fur Kinderforschung,1934
3. Inheritance of ear pits in six generations of a family;Connon;Journal of Heredity,1941
4. Earpit and its inheritance;Hartmann;Journal of Heredity,1880
5. Inheritance of a pit in the skin of the left ear;Kindred;Journal of Heredity,1921