Ahire, Kailas S., and Rajashri B. Sawant. 2016. “Hyper-Wiener Index, Hyper-Hosoya Polynomial For Tree Of Isomers Of Pentane”. International Journal Of Mathematics And Computer Research 4 (01), 1230-35. http://ijmcr.in/index.php/ijmcr/article/view/22.