1. The causes of severe mental handicap;MacKay, R.I.;Dev Med Child Neurol,1982
2. The aetiological aspects of mental subnormalitypathological factors;Berg, J.M.,1965
3. The pathology of mental retardation;Crome, L.; Stern, J.,1973
4. Severe mental retardation in a Swedish county. II: Etiology and pathogenetic aspects of children born 1959-1970;Gustavson, K.H.; Hagberg, B.; Hagberg, G.; Sars, K.;Neuropadiatrie,1977
5. Groups at risk in low birth weight infants and perinatal mortality;Rantakallio, P.;Acta Paediatr Scand,1969