1. Bochner, S. and Chandresakharan, K., Fourier Transforms, Annals of Mathematics Studies, No. 19, Princeton University Press, Princeton, 1949.
2. Bochner, S. and Martin, W.T., Several Complex Variables, Princeton University Press, Princeton, 1948.
3. Courant, R. and Hilbert, D., Methods of Mathematical Physics, V. I, Interscience Publishers, Inc., New York, 1953.
4. Jahnke, E. and Emde, F., Tables of Functions with Formulae and Curves, Dover Publications, New York, 1945.
5. Magnus, W. and Oberhettinger, F, Formulas and Theorems for the Special Functions of Mathematical Physics, Chelsea Publishing Co., New York, 1949.