@ARTICLE{
author={de Abreu Nair MM,Vinagre Cybele,Bonifacio Andrea Soares,Gutman Ivan},
year={2008},
title={The Laplacian energy of some Laplacian integral graphs},
journal={MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY},
volume={60},
number={2},
pages={447-460},
document_type={Article},
} 

@ARTICLE{
author={Gutman Ivan,de Abreu Nair MM,Vinagre Cybele,Bonifacio Andrea Soares,Radenkovic Slavko},
year={2008},
title={Relation between energy and Laplacian energy},
journal={MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY},
volume={59},
number={2},
pages={343-354},
document_type={Article},
}