H. Nakatsuji and K. Hirao, “Cluster expansion of the wavefunction: Symmetry-adapted-cluster expansion, its variational determination, and extension of open-shell orbital theory,” J. Chem. Phys., 68 (1978) 2053-65. DOI: 10.1063/1.436028
H. Nakatsuji and K. Hirao, “Cluster expansion of the wavefunction: Symmetry-adapted-cluster expansion, its variational determination, and extension of open-shell orbital theory,” J. Chem. Phys., 68 (1978) 2053-65. DOI: 10.1063/1.436028
