@ARTICLE{5635431,
  author={Kantarci, Burak and Mouftah, Hussein T.},
  journal={IEEE Systems Journal}, 
  title={Periodic GATE Optimization (PGO): A New Service Scheme for Long-Reach Passive Optical Networks}, 
  year={2010},
  volume={4},
  number={4},
  pages={440-448},
  doi={10.1109/JSYST.2010.2082070}}