@ARTICLE{
author={Gutman Ivan,Radenkovic Slavko,Trinajstic N,Vodopivec Andrej},
year={2006},
title={On the relationship between pi-electron energy and topological resonance energy},
journal={ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL},
volume={61},
number={7-8},
pages={345-348},
document_type={Article},
} 

@ARTICLE{
author={Hollas B,Gutman Ivan,Trinajstic N},
year={2005},
title={On reducing correlations between topological indices},
journal={CROATICA CHEMICA ACTA},
volume={78},
number={4},
pages={489-492},
document_type={Article},
} 

@ARTICLE{
author={Trinajstic N,Gutman Ivan},
year={2002},
title={Mathematical chemistry},
journal={CROATICA CHEMICA ACTA},
volume={75},
number={2},
pages={329-356},
document_type={Review},
}