Accessing citizenship : the conceptual and political changes of the German naturalization policy, 1999–2006 - Björk, Anna (Contributions to the history of concepts. - Grupo de Pesquisa em História dos Conceitos e Teoria Política e Social do Instituto Universitário de Pesquisas do Rio de Janeiro (IUPERJ) ; History of Political and Social Concepts Group (HPSCG), 2014)