1. For H2+, e.g. the work of G. Jaffe, Zeits. f. Physik 87, 535 (1934);
2. for H2, H. M. James and A. S. Coolidge, J. Chem. Phys. 3, 129 (1935).JCPSA60021-9606
3. See, for example, L. Pauling and E. B. Wilson, Introduction to Quantum Mechanics (McGraw‐Hill Book Company, New York, 1935), Chaps. 6 and 7.
4. An example of a recently developed method is the numerical integration method of G. E. Kimball and G. H. Shortley, Phys. Rev. 45, 815 (1934).PHRVAO0031-899X
5. Punched‐card machine methods are labor‐saving where a long calculation involves many similar steps. For applications of punched‐card machines see W. J. Eckert, Punched Card Methods in Scientific Computation (Columbia University, 1940).