1. SciTegic, Inc. 10188 Telesis Court, Suite 100, San Diego, CA 92121, USA, http://www.scitegic.com/products_services/pipeline_pilot.htm
2. Todeschini, R. and Consonni, V., Handbook of Molecular Descriptors, Wiley-VCH, Weinheim, Germany, 2000.
3. Mark Johnson, M., Maggiora, G., (Eds.) Concepts and Applications of Molecular Similarity. Wiley, New York, 1990.
4. McGregor, M.J. and Pallai, P.V., Clustering of large databases of compounds: Using the MDL ‘keys’ as structural descriptors, J. Chem. Inf. Comput. Sci., 37 (1997) 443–448.
5. Breiman, L., Friedman, J.H., Olshen, R.A. and Stone, C.J., Classification and Regression Trees, Wadsworth and Brooks/Cole, Monterey, CA, 1984.