Diskussionspapiere extern
Daria Mendola, Annalisa Busetta, Arnstein Aassve
Colchester: University of Essex, Institute for Social and Economic Research, 2008, (ISER Working Paper No. 2008-04)
Externer Link:http://www.iser.essex.ac.uk/pubs/workpaps/pdf/2008-04.pdf