@ARTICLE{
author={Gutman Ivan,Wagner Stephan},
year={2012},
title={The matching energy of a graph},
journal={DISCRETE APPLIED MATHEMATICS},
volume={160},
number={15},
pages={2177-2187},
document_type={Article},
} 

@ARTICLE{
author={Wagner Stephan,Gutman Ivan},
year={2010},
title={Maxima and Minima of the Hosoya Index and the Merrifield-Simmons Index A survey of results and techniques},
journal={ACTA APPLICANDAE MATHEMATICAE},
volume={112},
number={3},
pages={323-346},
document_type={Article},
}