Baquero Cruz, Julio2010-07-072010-07-072010-07-07http://hdl.handle.net/10637/3018EN: Unity and flexibility in the future of the European Union: The challenge of enhanced cooperation. Pp. 39-46application/pdfenUniĆ³n Europea.Forms of flexibility in the social policy of the European UnionDocumento de trabajohttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es