RUCKDESCHEL, P.; KOHL, M. General Purpose Convolution Algorithm in S4 Classes by Means of FFT. Journal of Statistical Software, [S. l.], v. 59, n. 4, p. 1–25, 2014. DOI: 10.18637/jss.v059.i04. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v059i04. Acesso em: 27 nov. 2021.