@article{HeuermannSchiek2009,
  author    = {Holger Heuermann and Burkhard Schiek},
  title     = {The In-Fixture Calibration Procedure Line-Network-Network-LNN},
  journal   = {Conference proceedings : monday 6th to thursday 9th september 1993, Palacio de Congresos, Madrid, Spain ; [the international conference and exhibition designed for the Microwave Community]},
  pages     = {500 -- 505},
  year      = {2009},
}