Algorithm for Naming Molecular Equivalence Classes Represented by Labeled Pseudographs. - Yong-Jin Xu; Mark Johnson (J. Chem. Inf. Comput. Sci., 2001)

Using Molecular Equivalence Numbers To Visually Explore Structural Features that Distinguish Chemical Libraries. - Yong-Jin Xu; Mark Johnson (J. Chem. Inf. Comput. Sci., 2002)