K. Raghavachari, M. J. Frisch, and J. A. Pople, “Contribution of triple substitutions to the electron correlation energy in fourth-order perturbation theory,” J. Chem. Phys., 72 (1980) 4244-45. DOI: 10.1063/1.439657
K. Raghavachari, M. J. Frisch, and J. A. Pople, “Contribution of triple substitutions to the electron correlation energy in fourth-order perturbation theory,” J. Chem. Phys., 72 (1980) 4244-45. DOI: 10.1063/1.439657
