@inproceedings{chatzidiamantis_michalopoulos_kriezis_karagiannidis_schober_2011, 
  title={Relay Selection in Relay-Assisted Free Space Optical Systems}, 
  DOI={10.1109/glocom.2011.6134064}, 
  publisher={IEEE}, 
  author={Chatzidiamantis and Michalopoulos and Kriezis and Karagiannidis and Schober}, 
  year={2011}
  }