@Proceedings{Johannsen.1993,

  title  = {Proceedings of the XII. European Annual Conference on Human Decision Making and Manual Control: Held at the University of Kassel Kassel Germany June 22 - 24 1993: 22,-24, Juni 1993},

  year   = {1993},
  number = {},
  url    = {},

  const  = {\ text}
}
@Proceedings{Borys.1997c,

  title  = {Proceedings of the XVI. European Annual Conference on Human Decision Making and Manual Control},

  year   = {1997},
  number = {},
  url    = {http://www.imat.maschinenbau.uni-kassel.de/eam/index.html},

  const  = {\ text}
}