@article{Heuermann2007,
  author    = {Holger Heuermann},
  title     = {GSOLT: the calibration procedure for all multi-port vector network analyzers},
  journal   = {IEEE MTT-S International Microwave Symposium digest : Philadelphia, Pennsylvania, 8 - 13 June 2003 ; [including: 2003 International Microwave Symposium digest, vol. 1-3, RF Integrated Circuit Symposium digest, Automatic RF Techniques Group Symposium digest . Vol. 3},
  pages     = {1815 -- 1818},
  year      = {2007},
}