TIKKA, S.; HYTTINEN, A.; KARVANEN, J. Causal Effect Identification from Multiple Incomplete Data Sources: A General Search-Based Approach. Journal of Statistical Software, [S. l.], v. 99, n. 5, p. 1–40, 2021. DOI: 10.18637/jss.v099.i05. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v099i05. Acesso em: 26 oct. 2021.