1. H. Wiener, Structural determination of paraffin boiling points, J. Amer. Chem. Soc.,69 (1947), 17-20.
2. B. Zhou and Z. Du, Minimum Wiener indices of trees and unicyclic graphs of given matching number, MATCH Commun. Math. Comput. Chem., 63(1) (2010), 101 – 112.
3. M. Randić, On characterization of molecular branching, J. Am. Chem. Soc., 97 (1975), 6609-6615.
4. E. Estrada, L. Torres, L. Rodríguez and I. Gutman, An atom-bond connectivity index: modeling the enthalpy of formation of alkanes, Indian J. Chem., 37A (1998), 849-855.
5. E. Estrada, Atom-bond connectivity and the energetic of branched alkanes, Chem. Phys. Lett., 463 (2008), 422-425.
6. I. Gutman, and N. Trinajstić, Graph theory and molecular orbitals. Total π- electron energy of alternant hydrocarbons, Chem. Phys. Lett., 17 (1972), 535- 538.
7. K. Ch. Das, Atom-bond connectivity index of graphs, Disc. Appl. Math., 158 (2010), 1181-1188.
8. K. C. Das, I. Gutman and B. Furtula, On atom-bond connectivity index, Chem. Phys. Lett., 511 (2011), 452–454.
9. G. Chartrand and P. Zhang, Chromatic Graph Theory, Chapman and Hall/CRC, 2008.
)
)