1. National Institute for Health and Welfare Yearbook of Alcohol and Drug Statistics 2009 2009 http://www.stakes.fi/tilastot/tilastotiedotteet/2009/paihde/Paihdetilastollinen2009.pdf
2. National Institute for Health and Welfare Child Welfare 2008. Statistical Report 19/2009 2009 http://www.stakes.fi/tilastot/tilastotiedotteet/2009/Tr19_09.pdf
3. Kajava M The welfare of the child in the process of taking into care. Research on cases taking into care without the parents’ consent Doctoral Thesis Acta Universitatis Ouluensis E26 1997
4. Relationship between reason for placement and medical findings among children in foster care;Takayama;Pediatrics,1998
5. Children of substance abusers: overview of research findings;Johnson;Pediatrics,1999