@article{HeuermannSchiek1995,
  author    = {Heuermann, Holger and Schiek, Burkhard},
  title     = {The double-LNN Calibration technique for scattering parameter measurements of microstrip devices},
  series = {Conference proceedings},
  journal   = {Conference proceedings},
  publisher = {NEXUS House},
  address   = {Kent},
  pages     = {343 -- 347},
  year      = {1995},
  language  = {en}
}
@article{Heuermann1995,
  author    = {Heuermann, Holger},
  title     = {LZY: A Self-Calibration Approach in Competition to the LRM Method for On-Wafer Measurements},
  pages     = {129 -- 136},
  year      = {1995},
  language  = {en}
}