1. aPople, J.InEnergy, Structure, and Reactivity;Smith, D., McRae, W., Eds.Wiley:New York, 1973; p51.
2. Theoretical models incorporating electron correlation
3. Approximate fourth-order perturbation theory of the electron correlation energy
4. aHelgaker, T.; Klopper, W.; Halkier, A.; Bak, K. L.; Jørgensen, P.; Olsen, J.InQuantum-Mechanical Prediction of Thermochemical Data;Cioslowski., J., Ed.Kluwer Academic:Dordrecht, 2001; pp1–30;
5. bMartin, J. M. L.; Parthiban, S.InQuantum-Mechanical Prediction of Thermochemical Data;Cioslowski., J., Ed.Kluwer Academic:Dordrecht, 2001; pp31–65;