Benchmark for two-photon ionization of atoms with generalized Sturmian functions Antonio I. Gómez, Gustavo Gasaneo, Darío M. Mitnik, Marcelo J. Ambrosio and Lorenzo U. Ancarani Eur. Phys. J. D, 70 10 (2016) 207 Published online: 18 October 2016 DOI: 10.1140/epjd/e2016-70259-5