Triazene Proton Affinities: A Comparison between Density Functional, Hartree-Fock, and Post-Hartree-Fock Methods. - Ann M. Schmiedekamp; Igor A. Topol; Stanley K. Burt; Holy Razafinjanahary; Henry Chemette; Timothy Pfalzgraff; Christopher J. Michejda (J. Comput. Chem., 1994)

Building molecular charge distributions from fragments: Application to HIV-1 protease inhibitors. - L. Young; Igor A. Topol; A. A. Rashin; Stanley K. Burt (J. Comput. Chem., 1997)

Flexible effective fragment QM/MM method: Validation through the challenging tests. - Alexander V. Nemukhin; Bella L. Grigorenko; Igor A. Topol; Stanley K. Burt (J. Comput. Chem., 2003)

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. - András Perczel; Ödön Farkas; Imre Jákli; Igor A. Topol; Imre G. Csizmadia (J. Comput. Chem., 2003)