Flexibility in constitutions : forms of closer cooperation in federal and non-federal settings / Annette Schrauwen (ed.)De Verdragen van Amsterdam en Nice over de Europese Unie / R.H. LauwaarsThe Treaty of Nice : actor preferences, bargaining and institutional choice / ed. by Finn LaursenThe black box of the Nice Treaty Negotiations : the influence of the Dutch cabinet / Sander LuitwielerThe black box of the Nice Treaty Negotiations : the influence of the Dutch cabinet / door Sander Luitwieler