Electronic correlation energy in 3- and 4-electron atoms

New Developments in Molecular Orbital Theory

Clemens Roothaan · Reviews of Modern Physics · 1951 · 5.5K citations

Natural Sciences, Chemistry, Physics +14

Scaling problem, virial theorem, and connected relations in quantum mechanics

Per‐Olov Löwdin · Journal of Molecular Spectroscopy · 1959 · 508 citations

Natural Sciences, Mathematics, Physics +14

Superposition of Configurations and Natural Spin Orbitals. Applications to the He Problem

Harrison Shull, Per‐Olov Löwdin · The Journal of Chemical Physics · 1959 · 313 citations

Natural Sciences, Physics, Quantum Chemistry +16

Tables for Determining Atomic Wave Functions and Energies

Philip Μ. Morse, L. A. Young, Eva S. Haurwitz · Physical Review · 1935 · 216 citations

Natural Sciences, Chemistry, Physics +8

Correlation Splitting in Helium-Like Ions

Harrison Shull, Per‐Olov Löwdin · The Journal of Chemical Physics · 1956 · 154 citations

Natural Sciences, Physics, Atomic Physics +15