Algebraic tools for dealing with the atomic shell model. I. Wavefunctions and integrals for hydrogen-like ions. - Andrey Surzhykov; Peter Koval; Stephan Fritzsche (Comput. Phys. Commun., 2005)

DIRAC: A new version of computer algebra tools for studying the properties and behavior of hydrogen-like ions. - Sean McConnell; Stephan Fritzsche; Andrey Surzhykov (Comput. Phys. Commun., 2010)