@ARTICLE{
author={Hosoya H,Gutman Ivan},
year={2008},
title={Kekule structures of hexagonal chains - some unusual connections},
journal={JOURNAL OF MATHEMATICAL CHEMISTRY},
volume={44},
number={2},
pages={559-568},
document_type={Article},
} 

@ARTICLE{
author={Gutman Ivan,Radenkovic Slavko,Furtula Boris,Hosoya H},
year={2005},
title={Some properties of the topological bond order},
journal={CHEMICAL PHYSICS LETTERS},
volume={407},
number={1-3},
pages={73-77},
document_type={Article},
} 

@ARTICLE{
author={Gutman Ivan,Furtula Boris,Vidovic Dusica,Hosoya H},
year={2004},
title={A concealed property of the topological index Z},
journal={BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN},
volume={77},
number={3},
pages={491-496},
document_type={Article},
} 

@ARTICLE{
author={Gutman Ivan,Vidovic Dusica,Hosoya H},
year={2002},
title={The relation between the eigenvalue sum and the topological index Z revisited},
journal={BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN},
volume={75},
number={8},
pages={1723-1727},
document_type={Article},
}