1. Duplicate thumbs: A survey of results in twenty patients;Andrew;J Hand Surg,1988
2. Guerison d’un pouce bifide par un nouveau procede operatoire;Bilhaut;Congres Francais de Chir (4 session, 1889),1890
3. Congenital malformations;Buck-Gramcko,1988
4. Polydactyly of the thumb: A surgical plan based on ninety-five cases;Cheng;J Hand Surg,1984
5. Duplicate thumbs (preaxial polydactyly);Dobyns,1988