1. Aringhieri R., Hansen P., Malucelli F.: A linear algorithm for the hyper-Wiener index of chemical trees. J. Chem. Inf. Comput. Sci. 41, 958–963 (2001)
2. Bethune D.S., Kiang C.H., Devries M.S., Gorman G., Savoy R., Vazquez J., Beyers R.: Cobalt catalyzed growth of carbon nanotubes with single atomic layer walls. Nature 363, 605–607 (1993)
3. Diudea M.V.: Hosoya polynomial in tori, MATCH Commun. Math. Comput. Chem. 45, 109–122 (2002)
4. M.V. Diudea, Covering nanostructures, in Nanostructures-Novel Architecture, ed. by M.V. Diudea (NOVA, New York, 2005), pp. 203–242
5. Estrada E., Ivanciuc O., Gutman I., Gutierrez A., Rodriguez L.: Extended Wiener indices. A new set of descriptors for quantitative structure-property studies, New J. Chem. 22, 819–822 (1998)