M. Hajer y M. Ambrosini, «Who help irregular migrants? Supporters of irregular migrants in Amsterdam (the Netherlands) and Turin (Italy): Supporters of irregular migrants in Amsterdam (the Netherlands) and Turin (Italy)», Revista Interdisciplinar da Mobilidade Humana, vol. 28, n.º 59, pp. 199–216, sep. 2020, doi: 10.1590/1980-85852503880005912.