Relative Energies and Structural Features of Small Amines and Their Ammonium Analogs: Results From 6-31G* Optimizations and an Mm2 Ammonium Force Field. - Salvatore Profeta Jr.; Raymond J. Unwalla; Daniel J. Russell (Int. J. High Perform. Comput. Appl., 1994)

FAD : a functional analysis and design methodology. - Daniel J. Russell (2001)