1. Hirschsprung's disease;Madsen,1964
2. Quelques considérations sur le becde-lièvre;Demarquay;Gaz Med Paris,1845
3. Congenital lip sinuses;Wang;Plast Reconstr Surg,1956
4. Fistula labii inferioris congenita and its association with cleft lip and palate;Van der Woude;Am J Hum Genet,1954
5. The syndrome of pits of the lower lip and cleft lip and/or palate. Genetic considerations;Cervenka;Am J Hum Genet,1967