[1] H. Hosoya, Topological index. A newly proposed quantity characterizing the topological nature of structural isomers of saturated hydrocarbons. Bull. Chem. Soc. Japan, 44 (1971) 2332-2339.
[2] H. Wiener, determination of paraffin boiling points, J. Am. Chem. Soc., 69 (1947) 17-20.
[3] I. Gutman, A formula for the Wiener number of trees and its extension to graphs containing cycles, Graph Theory Notes, 27 (1994) 9-15.
[4] F. Vogtle (Ed.), Topics in Current Chemistry, Dendrimers II: Architecture, Nanostructure and Supramolecular Chemistry, No. 210, Springer-Verlag, Berlin (2000).
[5] M. V. Diudea (Ed.), Nanostructures: Novel Architecture, Nova, New York, 2006.
[6] A. Heydari, I. Gutman, On the terminal Wiener index of thorn graphs, Kragujevac J. Sci., 32 (2010) 57-64.
[7] H. Yousefi-Azari, A.R. Ashrafi and M.H. Khalifeh, Computing vertex-PI index of single and multi-walled nanotubes, Digest Journal of Nanomaterials and Biostructures, 3(4) (2008) 315-318.
)
)