1. M. Abramowitz and I. Stegun (eds),Handbook of Mathematical Functions. Dover Publications (1964).
2. I.S. Gradshteyn and I.M. Ryzhik,Table of Integrals, Series, and Products. Academic Press (1980).
3. L.F. Greengard,The Rapid Evaluation of Potential Fields in Particle Systems. ACM distinguished dissertation: 1987. MIT Press (1988).
4. J.N. Newman, The approximation of free-surface Green functions. In:Wave Asymptotics, Proceedings of the Fritz Ursell Retirement Meeting, Cambridge University Press (1990).
5. P.M. Morse and H. Feshbach,Methods of Theoretical Physics. McGraw-Hill (1953).