@article{kralevska2013asymptotic,
  title={Asymptotic Performance of Bidirectional Dual-Hop Amplify-and-Forward Systems}
  author={Kralevska, Katina and Hadzi-Velkov, Zoran and Øverby, Harald}
  journal={ICT Innovations 2013, Web Proceedings ISSN 1857-7288}
  pages={283--289}
  year={2013}
}