@article{onthecombinedeffectofdirectional,
  title = {On the Combined Effect of Directional Antennas and Imperfect Spectrum Sensing upon Ergodic Capacity of Cognitive Radio Systems},
  year = {2017},
  eprint = {1712.00115},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1712.00115v1},
}