ON VALIDITY OF ELECTRON PAIR APPROXIMATION FOR BERYLLIUM GROUND STATE

[21] KUTZELNIGG W, 1965, Z NATURFORSCH, VA 20, P168

[22] QUANTUM THEORY OF MANY-PARTICLE SYSTEMS .1. PHYSICAL INTERPRETATIONS BY MEANS OF DENSITY MATRICES, NATURAL SPIN-ORBITALS, AND CONVERGENCE PROBLEMS IN THE METHOD OF CONFIGURATIONAL INTERACTION [J]. PHYSICAL REVIEW, 1955, 97 (06): : 1474 - 1489

[23] SOME RECENT ADVANCES IN DENSITY MATRIX THEORY [J]. REVIEWS OF MODERN PHYSICS, 1960, 32 (02) : 335 - 369

[24] MCWEENY R, 1963, P ROY SOC LONDON, VA273, P103

[25] 2-BODY CORRELATION OF INTERACTING FERMIONS [J]. PROGRESS OF THEORETICAL PHYSICS, 1959, 21 (05): : 713 - 726

[26] COMPARISON OF HARTREE-FOCK ORBITAL WITH FIRST NATURAL SPIN ORBITAL FOR 2-ELECTRON SYSTEMS [J]. JOURNAL OF CHEMICAL PHYSICS, 1963, 39 (03) : 715 - &

[27] SASAKI F, 1962, 77 QUANT CHEM GROUP

[28] SUPERPOSITION OF CONFIGURATIONS AND NATURAL SPIN ORBITALS - APPLICATIONS TO THE HE PROBLEM [J]. JOURNAL OF CHEMICAL PHYSICS, 1959, 30 (03) : 617 - 626

[29] SHULL H, PRIVATE COMMUNICATIO

[30] MANY-ELECTRON THEORY OF ATOMS, MOLECULES AND THEIR INTERACTIONS [J]. ADVANCES IN CHEMICAL PHYSICS, 1964, 6 : 315 - 412

[21] KUTZELNIGG W, 1965, Z NATURFORSCH, VA 20, P168

[22] QUANTUM THEORY OF MANY-PARTICLE SYSTEMS .1. PHYSICAL INTERPRETATIONS BY MEANS OF DENSITY MATRICES, NATURAL SPIN-ORBITALS, AND CONVERGENCE PROBLEMS IN THE METHOD OF CONFIGURATIONAL INTERACTION [J]. PHYSICAL REVIEW, 1955, 97 (06): : 1474 - 1489

[23] SOME RECENT ADVANCES IN DENSITY MATRIX THEORY [J]. REVIEWS OF MODERN PHYSICS, 1960, 32 (02) : 335 - 369

[24] MCWEENY R, 1963, P ROY SOC LONDON, VA273, P103

[25] 2-BODY CORRELATION OF INTERACTING FERMIONS [J]. PROGRESS OF THEORETICAL PHYSICS, 1959, 21 (05): : 713 - 726

[26] COMPARISON OF HARTREE-FOCK ORBITAL WITH FIRST NATURAL SPIN ORBITAL FOR 2-ELECTRON SYSTEMS [J]. JOURNAL OF CHEMICAL PHYSICS, 1963, 39 (03) : 715 - &

[27] SASAKI F, 1962, 77 QUANT CHEM GROUP

[28] SUPERPOSITION OF CONFIGURATIONS AND NATURAL SPIN ORBITALS - APPLICATIONS TO THE HE PROBLEM [J]. JOURNAL OF CHEMICAL PHYSICS, 1959, 30 (03) : 617 - 626

[29] SHULL H, PRIVATE COMMUNICATIO

[30] MANY-ELECTRON THEORY OF ATOMS, MOLECULES AND THEIR INTERACTIONS [J]. ADVANCES IN CHEMICAL PHYSICS, 1964, 6 : 315 - 412