High-Speed Si-Bipolar and GaAs Technologies. - Klaus Wörner; Alex Colquhoun (IEEE J. Sel. Areas Commun., 1986)

Wide-band symmetrical analog multiplier IC for coherent optical-fiber receivers operating up to 10 Gb/s. - Hans-Martin Rein; Lothar Schmidt; Klaus Wörner; Wilhelm Pieper (IEEE J. Solid State Circuits, 1991)