KREIDL, M., GANZEBOOM, H., TREIMAN, D. Trends in occupational returns to education: a comparative perspective. In: Social stratification, social mobility and social exclusion, RC 28 meeting in Neuchatel, May, 2004. Neuchatel: Sidos, 2004, s. 225-286. Dostupné z: http://www.sidos.ch/method/RC28/RC28_1.asp?lang=d