The ionization energy of the helium atom

The Quantum Defect Method

1958 • 406 citations

Ionization potentials and Lamb shifts of the ground states of ⁴ He and ³ He

1958 • 124 citations

Energy levels and spectrum of neutral helium (4He I)

1960 • 117 citations

The method of polarized orbitals for the elastic scattering of slow electrons by ionized helium and atomic hydrogen

1964 • 106 citations