@article{kakasevski2011heterogeneous,
  title={Heterogeneous Distributed Databases and Distributed Query Processing in Grid Computing}
  author={Kakasevski, Gjorgi and Mishev, Anastas and Jakimovski, Boro}
  journal={ICT Innovations 2011, Web Proceedings ISSN 1857-7288}
  pages={1--11}
  year={2011}
}