@ARTICLE{
author={Beg Ismat,Butt Asrna Rashid,Radojevic Slobodan},
year={2010},
title={The contraction principle for set valued mappings on a metric space with a graph},
journal={COMPUTERS & MATHEMATICS WITH APPLICATIONS},
volume={60},
number={5},
pages={1214-1219},
document_type={Article},
}