HEIKKILÄ, E. Humanitarian migration crisis in Europe – main routes and migrant groups. Siirtolaisuus-Migration, [S. l.], v. 42, n. 4, p. 33, 2015. Disponível em: https://siirtolaisuus-migration.journal.fi/article/view/89790. Acesso em: 18 touko. 2022.