@ARTICLE{
author={Koolen JH,Moulton V,Stevanovic Dragan P},
year={2004},
title={The structure of spherical graphs},
journal={EUROPEAN JOURNAL OF COMBINATORICS},
volume={25},
number={2},
pages={299-310},
document_type={Article},
} 

@ARTICLE{
author={Koolen JH,Moulton V,Gutman Ivan,Vidovic Dusica},
year={2000},
title={More hyperenergetic molecular graphs},
journal={JOURNAL OF THE SERBIAN CHEMICAL SOCIETY},
volume={65},
number={8},
pages={571-575},
document_type={Article},
} 

@ARTICLE{
author={Gutman Ivan,Koolen JH,Moulton V,Parac M,Soldatovic Tanja V,Vidovic Dusica},
year={2000},
title={Estimating and approximating the total pi-electron energy of benzenoid hydrocarbons},
journal={ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES},
volume={55},
number={5},
pages={507-512},
document_type={Article},
} 

@ARTICLE{
author={Koolen JH,Moulton V,Gutman Ivan},
year={2000},
title={Improving the McClelland inequality for total pi-electron energy},
journal={CHEMICAL PHYSICS LETTERS},
volume={320},
number={3-4},
pages={213-216},
document_type={Article},
}