SCHONLAU, Matthias; VAN SOEST, Arthur; KAPTEYN, Arie. Are `Webographic’ or attitudinal questions useful for adjusting estimates from Web surveys using propensity scoring?. Survey Research Methods, [S. l.], v. 1, n. 3, p. 155–163, 2007. DOI: 10.18148/srm/2007.v1i3.70. Disponível em: https://ojs.ub.uni-konstanz.de/srm/article/view/70. Acesso em: 22 jun. 2024.