Calculation of atomic scattering factors for the helium atom by means of the six-term Hylleraas wave function
- 10 September 1963
- journal article
- Published by International Union of Crystallography (IUCr) in Acta Crystallographica
- Vol. 16 (9) , 926-928
- https://doi.org/10.1107/s0365110x63002462