Bryan James Ken Caviness Jonathan Geach Chris Walters Ray Hefferlin Global Molecular Identification from Graphs. Neutral and Ionized Main-Group Diatomic Molecules. 1-7 2002 42 Journal of Chemical Information and Computer Sciences 1 http://dx.doi.org/10.1021/ci010047j db/journals/jcisd/jcisd42.html#JamesCGWH02