1. http://geant4.cern.ch.
2. www.talys.eu.
3. Handbook of Mathematical Functions, Ed. by M. Abramovitz and I. Stegun (Nation. Bureau of Standards, New York, 1964).
4. F. W. J. Olver, D. W. Lozier, R. F. Boisvert, and C. W. Clark, NIST Handbook of Mathematical Functions (NIST, Gaithersburg, 2010).
5. C. E. Froberg, Rev. Mod. Phys. 27, 399 (1955).