@article{1831,
  author       = {{Valentin, Stefan and Karl, Holger}},
  issn         = {{1124-318X}},
  journal      = {{European Transactions on Telecommunications}},
  number       = {{8}},
  pages        = {{714--724}},
  publisher    = {{Wiley-Blackwell}},
  title        = {{{Cooperative feedback to improve capacity and error rate in multiuser diversity systems - an OFDM case study}}},
  doi          = {{10.1002/ett.1454}},
  volume       = {{21}},
  year         = {{2010}},
}

@article{1378,
  author       = {{Gross, James and Valentin, Stefan and Karl, Holger and Wolisz, Adam}},
  issn         = {{1124-318X}},
  journal      = {{European Transactions on Telecommunications}},
  number       = {{1}},
  pages        = {{37--49}},
  publisher    = {{Wiley-Blackwell}},
  title        = {{{A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system}}},
  doi          = {{10.1002/ett.1030}},
  volume       = {{16}},
  year         = {{2005}},
}