András Perczel, Ödön Farkas, Imre Jákli, Igor A. Topol, Imre G. Csizmadia Peptide models. XXXIII. Extrapolation of low-level Hartree-Fock data of peptide conformation to large basis set SCF, MP2, DFT, and CCSD(T) results. The Ramachandran surface of alanine dipeptide computed at various levels of theory. [Citation Graph (0, 0)][DBLP] Journal of Computational Chemistry, 2003, v:24, n:9, pp:1026-1042 [Journal]