OLMOS, Antonio; GOVINDASAMY, Priyalatha. Propensity Scores: A Practical Introduction Using R. Journal of MultiDisciplinary Evaluation, Kalamazoo, MI, USA, v. 11, n. 25, p. 68–88, 2015. DOI: 10.56645/jmde.v11i25.431. Disponível em: https://jmde.journals.publicknowledgeproject.org/index.php/jmde_1/article/view/431. Acesso em: 14 feb. 2025.