WINDEBANK, Jan; WILLIAMS, Colin C. The implications for the informal sector of European Union integration. European Spatial Research and Policy, [S. l.], v. 2, n. 1, p. 17–33, 1995. DOI: 10.18778/1231-1952.2.1.02. Disponível em: https://czasopisma.uni.lodz.pl/esrap/article/view/24630. Acesso em: 26 mar. 2025.