1. Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables;Abramowitz,1964
2. NIST Digital Library of Mathematical Functions, http://dlmf.nist.gov/, Release 1.0.9 of 2014-08-29. Last access 25/09/2014.
3. Exponential Polynomials
4. Algorithm 755: ADOL-C
5. COSY INFINITY and its applications in nonlinear dynamics;Berz,1996