Quasi-degenerate perturbation theory with general multiconfiguration self-consistent field reference functions.

Haruyuki Nakano Ryuma Uchiyama Kimihiko Hirao Quasi-degenerate perturbation theory with general multiconfiguration self-consistent field reference functions. 1166-1175 2002 23 Journal of Computational Chemistry 12 http://dx.doi.org/10.1002/jcc.10050 db/journals/jcc/jcc23.html#NakanoUH02