@ARTICLE{
author={Hu YM,Li XL,Shi Yongtang T,Xu TY,Gutman Ivan},
year={2005},
title={On molecular graphs with smallest and greatest zeroth-order general Randic index},
journal={MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY},
volume={54},
number={2},
pages={425-434},
document_type={Article},
} 

@ARTICLE{
author={Li XL,Zhao HX,Gutman Ivan},
year={2005},
title={On the Merrifield-Simmons index of trees},
journal={MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY},
volume={54},
number={2},
pages={389-402},
document_type={Article},
}