Referências

   Griffiths, D. A. (1979). Maximum likelihood estimation for the beta-binomial distribution and an aplication to household distribution of total number of a disease, Biometrics .

   Madden, L. V. & Hughes, G. (1995). Plant disease incidence: Distributions, heterogeneity, and temporal analysis, Phytopathology .

   Skellam, J. G. A. (1948). A probability distribution derived from the binomial distribution by regarding the probability of sucess as variable between the sets of trials, Journal of Royal Statistical Society, Series B .

   Venables, W. N. & Ripley, B. D. (2002). Modern Applied Statistics with S, Fourth edition.