EU industrial relations v. national industrial relations: Comparative and interdisciplinary perspectives, Alphen aan den Rijn, Netherlands: Wolters Kluwer 2008 : 169-191
Network on Free Movement of Workers within the European Union, Report on 2006. Report for the European Commission on the Implementation of EU free movement law in 25 Member States, Centre for Migration Law, Nijmegen 2007 : 1023-1057
Report for the European Commission on the Implementation of EU free movement law in 25 Member States, Centre for Migration Law (CMR) Nijmegen : 1023-1057
Report on 2005. Report for the European Commission on the Implementation of EU free movement law in 25 Member States, Centre for Migration Law, Nijmegen 2006 : 955-958