FURRER, R.; SAIN, S. R. spam: A Sparse Matrix R Package with Emphasis on MCMC Methods for Gaussian Markov Random Fields. Journal of Statistical Software, [S. l.], v. 36, n. 10, p. 1–25, 2010. DOI: 10.18637/jss.v036.i10. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v036i10. Acesso em: 8 aug. 2022.