@Manual{openstage40doku,

  title  = {Dokumentation
HiPath 8000
OpenStage 40 OpenStage 40 G
OpenStage Key Module 40
Bedienungsanleitung},

  year   = {2008},
  number = {},
  url    = {http://cms.uni-kassel.de/unicms/fileadmin/groups/w_010200/Doku/Bedienungsanleitung_OpenStage_40_SIP.pdf},

  const  = {\ text}
}