@article{HeuermannErkens2007,
  author    = {Holger Heuermann and Holger Erkens},
  title     = {Blocking structures for mixed-mode systems. / Erkens, Holger ; Heuermann, Holger},
  journal   = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association. Vol. 1},
  pages     = {297 -- 300},
  year      = {2007},
}