K. Waaldijk et al. (eds.),The LawsAndFamilies Database – Aspects of legal family formats for same-sex and different-sex couples, Paris: INED, 2017, wwww.LawsAndFamilies.eu (question 4.x)
Willems, G. (2017). Migration and legal family formats in Belgium (The LawsAndFamilies Database – Aspects of legal family formats for same-sex and different-sex couples). https://hdl.handle.net/2078.5/126537