@PhdThesis{beuster:secure_interactive_systems,
  author = 	 {Gerd Beuster},
  title = 	 {A Methodology for Secure Interactive Systems},
  school = 	 {Universit{\" a}t Koblenz-Landau},
  year = 	 {2008},
  key = 	 {URN (NBN): urn:nbn:de:hbz:kob7-2875}
}