Thiel, W. (1998). Thermochemistry from Semiempirical Molecular Orbital Theory. In K.
K. Irikura, & D. J. Frurip (Eds.), ACS Symposium Series,
Vol. 677: Computational Thermochemistry: Prediction and Estimation of Molecular Thermodynamics (pp. 142-161). Washington,
DC: American Chemical Society.