@ARTICLE{
author={Das Kinkar Ch,Balachandran Selvaraj,Gutman Ivan},
year={2017},
title={Inverse Degree, Randic Index and Harmonic Index of Graphs},
journal={APPLICABLE ANALYSIS AND DISCRETE MATHEMATICS},
volume={11},
number={2},
pages={304-313},
document_type={Article},
} 

@ARTICLE{
author={Ayyaswamy Singaraj K,Balachandran Selvaraj,Venkatakrishnan Yanamandram B,Gutman Ivan},
year={2011},
title={Signless Laplacian Estrada Index},
journal={MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY},
volume={66},
number={3},
pages={785-794},
document_type={Article},
} 

@ARTICLE{
author={Ayyaswamy Singaraj K,Balachandran Selvaraj,Gutman Ivan},
year={2011},
title={Upper Bound for the Energy of Strongly Connected Digraphs},
journal={APPLICABLE ANALYSIS AND DISCRETE MATHEMATICS},
volume={5},
number={1},
pages={37-45},
document_type={Article},
}