M.J.S Dewar, E.G. Zoebisch, E.F. Healy and J.J.P. Stewart,
AM1: A New General Purpose Quantum Mechanical Model,
Journal of the American Chemical Society, Vol. 107, pp. 3902-3909, 1985.
J. Gasteiger and M. Marsili,
A New Model for Calculating Atomic Charges in Molecules,
Tetrahedron Letters, pp. 3181-3184, 1978.
J. Gasteiger and M. Marsili,
Iterative Partial Equalization of Orbital Electronegativity - A Rapid Access to Atomic Charges,
Tetrahedron, Vol. 36, pp. 3219-3228, 1980.
Araz Jakalian, David B. Jack and Christopher I. Bayly,
Fast, Efficient Generation of High-Quality Atomic Charges. AM1-BCC Model: II: Parameterization and Validation,
Journal of Computational Chemistry, Vol. 23, pp. 1623-1641, 2002.
K.B. Wiberg,
Application of the Pople-Santry=Segal CNDO Method to the Cyclopropylcarbinyl and Cyclobutyl Cation and to Bicyclobutane,
Tetrahedron, Vol. 24, pp. 1083-1096, 1966.