HEERWEGH, Dirk; ABTS, Koen; LOOSVELDT, Geert. Minimizing survey refusal and noncontact rates: do our efforts pay off?. Survey Research Methods, [S. l.], v. 1, n. 1, p. 3–10, 2007. DOI: 10.18148/srm/2007.v1i1.46. Disponível em: https://ojs.ub.uni-konstanz.de/srm/article/view/46. Acesso em: 30 apr. 2024.