1. E.C. Kirby, in From Chemical Topology to Three-Dimensional Geometry, ed. by A.T. Balaban (Plenum Press, New York, 1997), pp. 263–296
2. Bühl M., Hirsch A.: Chem. Rev. 101, 1153–1183 (2001)
3. Randić M.: Chem. Rev. 103, 3449–3605 (2003)
4. Salem K.: MATCH, Commun. Math. Comput. Chem. 53, 419–426 (2005)
5. Salem K.: MATCH, Commun. Math. Comput. Chem. 53, 427–440 (2005)