Ab initio determination of the proton affinities of small neutral and anionic moleculesD.J. DefreesA.D. McLean1986Journal of Computational Chemistry
Molecular orbital predictions of the vibrational frequencies of some molecular ionsD.J. DeFreesA.D. McLean1985The Journal of Chemical Physics
The quantum mechanical calculation of rotational spectra. A comparison of methods for C2H2, HCN, HNC, HCO+, N 2H+, CO and N2. Predictions for HCNH +, CO+, HBO, HBNH, and HBF+D.J. DefreesJ.S. Binkleyet al.1984The Journal of Chemical Physics