Abramowitz, M. and Stegun, A. (1970), Handbook of Mathematical Functions, New York: Dover Press.
Amemiya, T. (1985), Advanced Econometrics, Cambridge: Harvard University Press.
Cameron, A. C. and Trivedi, P. K. (1986), "Econometric Models Based on Count Data: Comparisons and Applications of Some Estimators and Some Tests," Journal of Applied Econometrics, 1, 29–53.
Cameron, A. C. and Trivedi, P. K. (1998), Regression Analysis of Count Data, Cambridge: Cambridge University Press.
Godfrey, L. G. (1988), Misspecification Tests in Econometrics, Cambridge: Cambridge University Press.
Greene, W. H. (1994), "Accounting for Excess Zeros and Sample Selection in Poisson and Negative Binomial Regression Models," Working Paper No. 94-10, New York: Stern School of Business, Department of Economics, New York University.
Greene, W. H. (2000), Econometric Analysis, Upper Saddle River, NJ: Prentice Hall.
Hausman, J. A., Hall, B. H., and Griliches, Z. (1984), "Econometric Models for Count Data with an Application to the Patents-R&D Relationship," Econometrica, 52, 909–938.
King, G. (1989a), "A Seemingly Unrelated Poisson Regression Model," Sociological Methods and Research, 17, 235–255.
King, G. (1989b), Unifying Political Methodology: The Likelihood Theory and Statistical Inference, Cambridge: Cambridge University Press.
Lambert, D. (1992), “Zero-Inflated Poisson Regression with an Application to Defects in Manufacturing,” Technometrics, 34, 1–14.
LaMotte, L. R. (1994), “A Note on the Role of Independence in Statistics Constructed from Linear Statistics in Regression Models,” The American Statistician, 48, 238–240.
Long, J. S. (1997), Regression Models for Categorical and Limited Dependent Variables, Thousand Oaks, CA: Sage Publications.
Searle, S. R. (1971), Linear Models, New York: John Wiley & Sons.
Winkelmann, R. (2000), Econometric Analysis of Count Data, Berlin: Springer-Verlag.