1. 1. Rutter M Madge N. Cycles of Disadvantage. London Englanif: Heinemann; 1976.
2. 2. Wilson WJ. The Truly Disadvantaffd. Chicago III: The University of Chicago Press; 1987.
3. 3. Davidson OG. Broken Heartland. New York NY: The Free Press; 1990.
4. 4. Rutter M. Protective factors in children's response* Io stress and disadvantage. In: Kent MW Rolf JE eds. Primary Prevención of Psychopaihokigy VuJ. Ill - Social Competence in Children Hanover NH: University Pressoi New England; 1979:49-74.
5. 5. Sameroff AJ Seifer R Barocas R Zax M Greenspan S. IQ scores of four-year-old children: social environmental risk fcctors. Pediatrics. 1987:79:343-350.