1. Quelques consid&rations sur le bec-de-li&vre;Demarquay, J.N.,1845
2. Congenital fistulas of the lower lip. Report of five cases with special reference to the etiology;K, Wattnabe Y.Hakushi I.Otake M.Tomida,1951
3. Fistula labii inferioris congenita and its association with cleft lip and palate;der Woude A, Van;Amii J Hum17 Genet,1954
4. The syndrome of pits of the lower lip and cleft lip and/or palate. Genetic considerations;Cervenka, J.; Gorlin, R.J.; Anderson, V.E.;Am J Hum Genet,1967
5. Lower lip sinuses;Rintala, A.E.; Ranta, R.;I. Epidemiology, microforms and transverse sulci. Br J Plast Surg,1981