Takayuki Kotani Kunihiko Higashiura Rapid Evaluation of Molecular Shape Similarity Index Using Pairwise Calculation of the Nearest Atomic Distances. 58-63 2002 42 Journal of Chemical Information and Computer Sciences 1 http://dx.doi.org/10.1021/ci010068d db/journals/jcisd/jcisd42.html#KotaniH02