@ARTICLE{
author={Govorcin Jelena,Gvozdenovic Nebojsa,Povh Janez},
year={2013},
title={New heuristics for the vertex coloring problem based on semidefinite programming},
journal={CENTRAL EUROPEAN JOURNAL OF OPERATIONS RESEARCH},
volume={21},
number={},
pages={S13-S25},
document_type={Article},
} 

@ARTICLE{
author={Djukanovic Igor,Govorcin Jelena,Gvozdenovic Nebojsa,Povh Janez},
year={2011},
title={On semidefinite programming based heuristics for the graph coloring problem},
journal={SOR'11 PROCEEDINGS: THE 11TH INTERNATIONAL SYMPOSIUM ON OPERATIONAL RESEARCH IN SLOVENIA},
volume={},
number={},
pages={103-108},
document_type={Proceedings Paper},
}