@article{DBLP:journals/tcom/LiuT12,
  author    = {Yuan Liu and
               Meixia Tao},
  title     = {Optimal Channel and Relay Assignment in OFDM-Based Multi-Relay
               Multi-Pair Two-Way Communication Networks},
  journal   = {IEEE Transactions on Communications},
  volume    = {60},
  number    = {2},
  year      = {2012},
  pages     = {317-321},
  ee        = {http://dx.doi.org/10.1109/TCOMM.2011.102011.100277},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}