GANGL, Markus. Counterfactuals and Causal Inference. Methods and Principles for Social Research. Stephen L. Morgan & Christopher Winship, 2007. methods, data, analyses, [S. l.], v. 2, n. 2, p. 204–206, 2008. DOI: 10.12758/mda.2008.015. Disponível em: https://majournals.bib.uni-mannheim.de/mda/article/view/2008.015. Acesso em: 7 dec. 2025.