BRÜDERL, Josef; TRAPPMANN, Mark. Data Collection in Panel Surveys. methods, data, analyses, [S. l.], v. 11, n. 1, p. 3–6, 2017. Disponível em: https://majournals.bib.uni-mannheim.de/mda/article/view/396. Acesso em: 8 oct. 2025.