1. Abramowitz M, Stegun IA. Handbook of mathematical functions. New York (NY): Dover; 1972.
2. Watson GN. A treatise on the theory of Bessel functions. Vols. 1, 2. Cambridge: Cambridge University Press; 1944.
3. Olver FWJ. Asymptotics and special functions. New York (NY): Academic Press; 1974.
4. Airy Functions and Applications to Physics
5. Olver FWJ, Lozier DW, Boisvert RF, et al. NIST handbook of mathematical functions. Cambridge: Cambridge University Press; 2010. Available from: http://dlmf.nist.gov.