HEAP, Dan. Visas Versus Refugees. Refuge: Canada’s Journal on Refugees, [S. l.], v. 6, n. 1, p. 7, 1986. DOI: 10.25071/1920-7336.41249. Disponível em: https://refuge3.journals.yorku.ca/index.php/refuge/article/view/41249. Acesso em: 11 apr. 2025.