BAILEY, D.; KATZ, J. N. Implementing Panel-Corrected Standard Errors in R: The pcse Package. Journal of Statistical Software, Code Snippets, [S. l.], v. 42, n. 1, p. 1–11, 2011. DOI: 10.18637/jss.v042.c01. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v042c01. Acesso em: 21 may. 2022.