@ARTICLE{
author={Shabani Hossein,Ashrafi Ali Reza,Gutman Ivan,Furtula Boris},
year={2013},
title={On Extensions of Wiener Index},
journal={MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY},
volume={69},
number={3},
pages={589-596},
document_type={Article},
} 

@ARTICLE{
author={Shabani Hossein,Ashrafi Ali Reza,Gutman Ivan},
year={2010},
title={Geometric-Arithmetic Index: An Algebraic Approach},
journal={STUDIA UNIVERSITATIS BABES-BOLYAI CHEMIA},
volume={55},
number={4},
pages={107-112},
document_type={Article},
}