1. Abramowitz, M., and I. A. Stegun. 1970. Handbook of mathematical functions: With formulas, graphs, and mathematical tables. Dover, New York.
2. Boundary Value Problems for Transport Equations
3. Exact series expansions, recurrence relations, properties and integrals of the generalized exponential integral functions
4. Bell, G. J., and S. Glasstone. 1970. Nuclear reactor theory. New York: Van Nostrand Reinhold Company.
5. Case, K. M., and P. F. Zweifel. 1967. Reading, MA: Linear transport theory. Addison-Wesley Publishing Company, Inc.