1. D.H. Rouvray, J. Chem. Inf. Comp. Sci. 32 (1992) 580.
2. M.A. Johnson and G.M. Maggiora (eds.),Concepts and Applications of Molecular Similarity (Wiley, New York, 1990).
3. R.I. Zalewski, T.M. Krygowski and J. Shorter (eds.),Similarity Models in Organic Chemistry, Biochemistry and related Fields (Elsevier, Amsterdam, 1991).
4. R. Carb� (ed.),Molecular Similarity and Reactivity. From Quantum Chemical to Phenomenological Approaches (Kluwer, Dordrecht, 1995).
5. K.D. Sen (ed.),Topics in Current Chem., Vols. 173,174 (Springer, Berlin, 1995).