Coester-Kummel 1957 CC + Cizek 1966 + Raghavachari 1989 CCSD(T): exponentiated cluster operator; (T) perturbative triples; chemical-accuracy benchmark for small systems.
Coester-Kummel 1957 CC + Cizek 1966 + Raghavachari 1989 CCSD(T): exponentiated cluster operator; (T) perturbative triples; chemical-accuracy benchmark for small systems.