1. Bowerman, B. L. & O’Connell, R. T. (1997),Applied Statistics, IRWIN.
2. Fox, B. L. & Glynn, P. W. (1988), «Computing poisson probabilities»,Communications of the Association for Computing Machinery
31(4), 440–445.
3. Hartung, J., Elpelt, B. & Klösener, K.-H. (2002),Statistik, 13 edn, Oldenbourg.
4. Johnson, N. L. & Kotz, S. (1970),Continuous Univariate Distributions-1, John Wiley & Sons.
5. Johnson, N. L., Kotz, S. & Kemp, A. W. (1992),Univariate Discrete Distributions, 2 edn, John Wiley & Sons.