@article{velinska2017optical,
  title={OPTICAL NETWORKS' TOPOLOGIES: COSTS, ROUTING AND WAVELENGTH ASSIGNMENT}
  author={Velinska, Jadranka and Mirchev, Miroslav and Mishkovski, Igor}
  journal={ICT Innovations 2017, Web Proceedings ISSN 1865-0937}
  pages={1--10}
  year={2017}
}