1. Socioeconomic inequalities in morbidity and mortality in Western Europe;Mackenbach;Lancet,1997
2. The constant flux. A study of class mobility in industrial countries;Erikson,1992
3. Socioeconomic Inequalities in Morbidity and Mortality in Europe:a comparative study;Kunst;Volume I:Main Report, Erasmus University Rotterdam,1996
4. United Nations,1984
5. Concepts of interaction;Rothman;Am JEpidemiol,1980