@article{HeuermannSchiek2009,
  author    = {Holger Heuermann and B. Schiek},
  title     = {Results of network analyzer measurements with leakage errors-corrected with direct calibration techniques},
  journal   = {IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5},
  pages     = {1120 -- 1127},
  year      = {2009},
}