CALONICO, S.; CATTANEO, M. D.; FARRELL, M. H. nprobust: Nonparametric Kernel-Based Estimation and Robust Bias-Corrected Inference. Journal of Statistical Software, [S. l.], v. 91, n. 8, p. 1–33, 2019. DOI: 10.18637/jss.v091.i08. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v091i08. Acesso em: 29 mar. 2024.