I M Alecu

Practical methods for including torsional anharmonicity in thermochemical calculations on complex molecules: the internal-coordinate multi-structural approximation.

Donald G Truhlar, Tao Yu, Jingjing Zheng, 2011, Physical chemistry chemical physics : PCCP.

Computational Thermochemistry: Scale Factor Databases and Scale Factors for Vibrational Frequencies Obtained from Electronic Model Chemistries.

Donald G Truhlar, Jingjing Zheng, Yan Zhao, 2010, Journal of chemical theory and computation.