EngelenE. R.2003. “How to Combine Openness and Protection? Citizenship, Migration, and Welfare Regimes,” Politics & Society31(4), 503–536.
2.
Van der LeunJ. P.2003. Looking for Loopholes; Processes of Incorporation of Illegal Immigrants in the Netherlands. Amsterdam: Amsterdam University Press.
3.
Van der LeunJ. P., and KloostermanR. C.2006. “Going Underground: Immigration Policy Changes and Shifts in Modes of Provision of Undocumented Immigrants in Rotterdam,” Tijdschrift voor Economische en Sociale Geografie97(1), 59–68.