KOHLER, Ulrich. Maintaining Quality. Survey Research Methods, [S. l.], v. 9, n. 3, p. 139–140, 2015. DOI: 10.18148/srm/2015.v9i3.6256. Disponível em: https://ojs.ub.uni-konstanz.de/srm/article/view/6256. Acesso em: 19 apr. 2024.