Wilson, George, and Nielsen, Amie L.. Annals of the American Academy of Political and Social Science, 634 (1):
174-189(2011)http://dx.doi.org/10.1177/0002716210388880. (ISSP).
R. Guetto, R. Luijkx, and S. Scherer. Acta Sociologica, 58 (2):
155-172(2015)First published online: March 5, 2015, http://dx.doi.org/10.1177/0001699315573335. (EVS).
J. Sprague-Jones. Ethnic and Racial Studies, 34 (4):
535-555(2011)First published online: October 14, 2010, http://dx.doi.org/10.1080/01419870.2010.512665. (Eurobarometer).
M. Maier, J. Maier, A. Baumert, N. Jahn, S. Krause, and S. Adam. European Union Politics, 16 (3):
369-385(2015)First published online: April 16, 2015, http://dx.doi.org/10.1177/1465116515577454. (Eurobarometer).