FÁVERO, L. P. L.; BELFIORE, P.; SANTOS, M. A. DOS; SOUZA, R. F. Overdisp: A Stata (and Mata) Package for Direct Detection of Overdispersion in Poisson and Negative Binomial Regression Models. Statistics, Optimization & Information Computing, v. 8, n. 3, p. 773-789, 14 Jun. 2020.