@ARTICLE{
author={Das KC,Bhatti Faqir M,Lee Sang-Gu,Gutman Ivan},
year={2011},
title={Spectral Properties of the He Matrix of Hexagonal Systems},
journal={MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY},
volume={65},
number={3},
pages={753-774},
document_type={Article},
}