1. Balaban, A.T., Motoc, I., Bonchev, D., Mekenyan, O.: Topological indices for structure-activity correlations. Top. Curr. Chem. 114, 21–55 (1983)
2. Basak, S.C., Grunwald, G.D., Niemi, G.J.: Use of graph-theoretic geometric molecular descriptors in structure-activity relationships. In: Balaban, A.T. (ed.) From Chemical Topology to Three-Dimensional Geometry, pp. 73–116. Plenum Press, New York (1997)
3. Basak, S.C., Gute, B.D., Grunwald, G.D.: A hierarchical approach to the development of QSAR models using topological, geometrical and quantum chemical parameters. In: Devillers, J., Balaban, A.T. (eds.) Topological Indices and Related Descriptors in QSAR and QSPR, pp. 675–696. Gordon & Breach, Amsterdam (1999)
4. Bollobás, B.: Modern Graph Theory. Springer, Berlin (1998)
5. Bollobás, B., Erdös, P.: Graphs of extremal weights. Ars Comb. 50, 225–233 (1998)