1) Hattab, F. N., Yassin, O. M. and Rawashden, M. A.: Supernumerary teeth Report of three cases and review of the literature, ASDC. J. Dent. Child., 61: 382-393, 1994.
2) Brook, A. H.: Dental Anomalies of number, form and size: their prevalence in British school children, J. Int. Assoc. Dent. Child.. 5: 37-53. 1974.