Multiconfiguration perturbation theory with imaginary level shift

Second-order perturbation theory with a complete active space self-consistent field reference function

Kerstin Andersson, Per‐Åke Malmqvist, Björn O. Roos · The Journal of Chemical Physics · 1992 · 3.8K citations

Spectral Theory, Engineering, Geometric Singular Perturbation Theory +20

Molecular spectra and molecular structure, iv, constants of diatomic molecules

W.J. Orville-Thomas · Journal of Molecular Structure · 1980 · 2.1K citations

Diatomic Molecules, Molecular Spectroscopy, Natural Sciences +7

Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions

Per‐Olof Widmark, Per-�ke Malmqvist, Bj�rn O. Roos · Theoretical Chemistry Accounts · 1990 · 2K citations

Quantum Dynamic, Engineering, Physics +12

Multiconfigurational perturbation theory with level shift — the Cr2 potential revisited

Björn O. Roos, Kerstin Andersson · Chemical Physics Letters · 1995 · 665 citations

Engineering, Perturbation Method, Physics +9

Electronic structure and vibrational frequency of Cr2

V. E. Bondybey, J. H. English · Chemical Physics Letters · 1983 · 229 citations

Engineering, Applied Physics, Quantum Chemistry +2