Montagu, M.F.A.The Significance of the Variability of the Upper Lateral Incisor Teeth in Man, Hum. Biol., 12:323-58, 1940.
4.
Clayton, J.M.Congenital Dental Anomalies Occurring in 3,557 Children, J. Dent. Child., 23: 206-8, 1956.
5.
Brekhus, P.J. , Montelius, G., and Oliver, C.P.A Study of the Pattern and Combinations of Congenitaly Missing Teeth in Man, J. dent. Res., 23:117-31, 1944.
6.
Brown, R.V.The Pattern and Frequency of Congenital Absence of Teeth, Iowa dent. J., 43:60-61,1957.
7.
D'Etiolles, L.Anomalies hereditaire des dents, C. R. Soc. Biol., 3:96, 1851.
8.
Grahnén, H.Hypodontia in the Permanent Dentition: A Clinical and Genetical Investigation , Odont. Revy, 7 :1-100, 1956.
9.
Rose, C.Über die Ruckbildung der seitlichen Schneidezahne des Oberkiefers und der Weisheitzahne im menschlichen Gebisse, Dtsch. Mschr. Zahnheilk. , 24:255-58, 1906.
