KOWARIK, A.; MERANER, A.; TEMPL, M.; SCHOPFHAUSER, D. Seasonal Adjustment with the R Packages x12 and x12GUI. Journal of Statistical Software, [S. l.], v. 62, n. 2, p. 1–21, 2014. DOI: 10.18637/jss.v062.i02. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v062i02. Acesso em: 7 jul. 2022.