1. M. Abramowitz and I. A. Stegun, Handbook of Mathematical Functions (reprinted by Dover, New York, 1965).
2. N. N. Lebedev, Special Functions and their Applications, R. A. Silverman, Ed. (reprinted by Dover, New York, 1972).
3. H. S. Carslaw and J. C. Jaeger, Conduction of Heat in Solids, 2nd ed. (Oxford University Press, London, 1959).
4. D. V. Widder, Advanced Calculus, 2nd ed. (Prentice-Hall, Englewood Cliffs, NJ, 1961). [Reprinted by Dover, New York.]
5. B. Gnedenko, The Theory of Probability (Mir Publishers, Moscow, 1976).