@Misc{patent,
  author = 	 {Groenewegen, L.P.J. and Vink, E.P. de},
  title = 	 {Method for transferring a computer system from a first to 
                  a second phase},
  howpublished = {Patent Number EP1703389-A2},
  year = 	 2006,
  note = 	 {Patent Assignee Leiden University, the Netherlands}
}