1. Ages of eruption of permanent teeth in mongols;Barkla;J. Ment. Defic. Res.,1966
2. A note on estimation of calendar age on the basis of development of primary teeth;Billewicz;J. Trop. Pediatr. Environ.,1973
3. Dental and facial characteristics in Down's syndrome (mongolism);Cohen;J. dent. Res.,1965
4. The oral manifestations of trisomy G1 (Down's syndrome);Cohen;Birth Defects.,1971
5. Nutritional status and the timing of deciduous tooth eruption;Delgado;Am. J. Clin. Nutr.,1975