E Neuscamman, T Yanai, G Chan, A review of canonical transformation theory, IRPC 29, 231 (2010)
H Fukutome, Theory of resonating quantum fluctuations in a fermion system, PTP 80, 417 (1988)
H Burton, Generalized nonorthogonal matrix elements: Unifying Wick's theorem and the Slater-Condon rules, JCP 154, 144109 (2021)
A A Granovsky, Extended multi-configuration quasi-degenerate perturbation theory: The new approach to multi-state multi-reference perturbation theory, JCP 134, 214113 (2011)
E Neuscamman, T Yanai, G Chan, Strongly contracted canonical transformation theory, JCP 132, 024106 (2010)
N Tomita, S Ten-no, Y Tanimura, Ab initio molecular orbital calculations by the resonating Hartree-Fock approach: superposition of non-orthogonal Slater determinants, CPL 263, 687 (1996)
N Gidopoulos, A Theophilou, Hartree-Fock equations determining the optimum set of spin orbitals for the expansion of excited states, Philos Mag B 69, 1067 (1994)