ELSTAD, Jon Ivar. S.L Morgan og C. Winship: Counterfactuals and Causal Inference. Methods and Principles for Social Research. Sosiologi i dag, [S. l.], v. 43, n. 3, 2013. Disponível em: https://www.ojs.novus.no/index.php/SID/article/view/1078. Acesso em: 3 mai. 2025.