@article{
  author = {maddah, elahe, lari, Mohammad},
  title = {Sum Rate and Energy Efficiency Maximization in a Cognitive Radio Network with a Successive Relay Primary User},
  journal = {Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran},
  year = {2021},
  volume = {18},
  number = {4},
  pages = {221-230},
  doi = {}
}