LOCNET-an experimental communications system using optical routing. - Helmut Bunning; Manfred Burmeister; Thomas Hermes; Friedrich Raub; Jürgen Saniter; Fred Schmidt; Wolfgang Werner (IEEE J. Sel. Areas Commun., 1988)

Cost optimization study using dispersion-managed fiber in a German backbone network. - Leo Nederlof; David Mirto; Sergey Ten; Matthias Gunkel; Dirk Breuer; Hans Reiner; Helmut Cremer; Ronald Freund; Christoph Caspar; Friedrich Raub (DRCN, 2005)