1. Belyea MJ, Loboa LM (1990) Psychosocial consequences of agricultural transformation: the farm crisis and depression. Rural Sociol 55:58–75
2. Cavan R (1928) Suicide. University of Chicago Press, Chicago
3. Chesnais J-C (1977/1978) As mortes violentas. Primeira parte: o homicídios e as execuções capitais e o suicídios. Revista do Centro de Estudos Demográficos No. 23. Instituto Nacional de Estatística, Lisbon
4. Davidson OG (1990) Broken heartland: the rise of America’s rural ghetto. The Free Press, New York
5. European Commission Directorate-General for Economic and Financial Affairs (2001) Enlargement Papers Number 5, Brussels