@article{HeuermannErkens2009,
  author    = {Holger Heuermann and H. Erkens},
  title     = {Mixed-Mode Chain Scattering Parameters: Theory and Verification},
  journal   = {IEEE Transactions on Microwave Theory and Techniques},
  volume    = {55},
  number    = {8},
  pages     = {1704 -- 1708},
  doi       = {10.1109/TMTT.2007.902587},
  year      = {2009},
}