Lawless, Jerald F. “Negative Binomial and Mixed Poisson Regression”. Canadian Journal of Statistics, vol. 15, no. 3, 1987, pp. 209-25, https://doi.org/10.2307/3314912.
Lawless, J. F. (1987). Negative binomial and mixed Poisson regression. Canadian Journal of Statistics, 15(3), 209-225. https://doi.org/10.2307/3314912
Lawless JF. Negative binomial and mixed Poisson regression. Canadian Journal of Statistics. 1987;15(3):209-25.