Morse, P. M.; Young, L. A.; Haurwitz, E. S. Tables for determining atomic wave functions and energies. (English) JFM 61.1591.15 Physical Rev. (2) 48, 948-954 (1935). PDF BibTeX XML Cite \textit{P. M. Morse} et al., Phys. Rev., II. Ser. 48, 948--954 (1935; JFM 61.1591.15) Full Text: DOI