1. M. J. Frisch et al., Gaussian 09, Revision D.01, Gaussian, Inc., Wallingford CT, 2009 (http://www.gaussian.com/g_prod/g09.htm).
2. “Molecule of the Week”, American Chemical Society 2005-2015 (https://www.acs.org/content/acs/en/molecule-of-the-week.html/).
3. CLiDE standard, Keyodule Ltd., Leeds, UK, 2014 (http://www.keymodule.co.uk/products/clide/index.html).
4. SMILES, a chemical language and information system. 1. Introduction to methodology and encoding rules
5. Open Babel: An open chemical toolbox