1. M. Abramowitz, and I. A. Stegun, Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, Wiley: New York, 1972.
2. R. H. Chan, “Iterative methods for overflow queueing models I,” Numerical Mathematics vol. 51 pp. 143–180, 1987.
3. R. H. Chan, “Iterative methods for overflow queueing models II,” Numerical Mathematics vol. 54 pp. 57–78, 1988.
4. W. Ching, and M. K. Ng, Markov Chains: Models, Algorithms and Applications, Springer: New York, 2006.
5. J. W. Cohen, “Sensitivity and insensitivity,” Delft Progress Report vol. 5 pp. 159–173, 1980.