@ARTICLE{
author={Goubko Mikhail,Magnant Colton,Nowbandegani Pouria Salehi,Gutman Ivan},
year={2015},
title={ABC Index of Trees with Fixed Number of Leaves},
journal={MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY},
volume={74},
number={3},
pages={697-702},
document_type={Article},
} 

@ARTICLE{
author={Magnant Colton,Nowbandegani Pouria Salehi,Gutman Ivan},
year={2015},
title={Which tree has the smallest ABC index among trees with k leaves?},
journal={DISCRETE APPLIED MATHEMATICS},
volume={194},
number={},
pages={143-146},
document_type={Article},
} 

@ARTICLE{
author={Gutman Ivan,Furtula Boris,Ahmadi Mohammad B,Hosseini Seyyed A,Nowbandegani Pouria Salehi,Zarrinderakht Maryam},
year={2013},
title={The ABC Index Conundrum},
journal={FILOMAT},
volume={27},
number={6},
pages={1075-1083},
document_type={Article},
}