References
- Abramowitz, M. and Stegun, I. A., Eds. (1964). Handbook of Mathematical Functions. U.S. Government Printing Office, Washington, D.C. pp. 940–941.
- Griffiths, P. and Hill, I. D. (1985). Applied Statistics Algorithms. Ellis Horwood Limited, Chichester, United Kingdom.
- Johnson, N. L. and Kotz, S. (1970). Continous Univariate Distributions. Houghton Mifflin, New York, NY, pp. 176–177.
- Nelson, L. S. (1987). “Comparison of Poisson Means: The General Case.” Journal of Quality Technology 19, pp. 173–179.
- Nelson, P. R. (1985). “Computation of Some Common Discrete Distributions.” Journal of Quality Technology 17, pp. 160–166.