5Berghman, "Social Security in a European Perspective: Present and Future Challenge", in: Social Protection and the European Economic and Monetary Union", Ed. by Josef Pacolet, Avebury Ashgate Publishing Ltd. , 1996. 被引量:1
6Berghman," Social Security in a European Perspective: Present and Future Challenge" ,in: Social Protection and the European Economic and Monetary Union", Ed. by Josef Pacolet, Avebury Ashgate Publishing Ltd. , 1996. 被引量:1