@TechReport{TR-74-211,
  author = 	 {Juergen Rilling and Philippe Charland and Ren\'{e} Witte},
  title = 	 {Traceability in Software Engineering -- Past, Present and Future},
  institution =  {IBM Technical Report: },
  year = 	 {2007},
  number =	 {TR-74-211},
  address =	 {CASCON 2007 Workshop},
  month =	 {October 25},
  note =	 {\url{http://www.ibm.com/ibm/cas/publications/cascon2007reports/cascon07_TR-74-211.pdf}}
}