Vibrational projection analysis: New tool for quantitatively comparing vibrational normal modes of similar molecules. - Anthony K. Grafton; Ralph A. Wheeler (J. Comput. Chem., 1998)

Vibalizer: A free, web-based tool for rapid, quantitative comparison and analysis of calculated vibrational modes. - Anthony K. Grafton (J. Comput. Chem., 2007)