@INPROCEEDINGS{Lormans:2004,
  AUTHOR = {M. Lormans and Dijk, H. van and Deursen, A. van and
                  E. N{\"{o}}cker and Zeeuw, A. de},
  TITLE = {Managing Evolving Requirements in an Outsourcing
                  Context: An Industrial Experience Report},
  BOOKTITLE = {Proceedings
   International Workshop on Principles of Software Evolution (IWPSE'04)},
  YEAR = 2004,
  pages = {149--158},
  publisher = {IEEE Computer Society}
}

@Article{Lormans:2005.informatie,
  AUTHOR = {M. Lormans and Dijk, H. van and Deursen, A. van and
                  E. N{\"{o}}cker and Zeeuw, A. de},
  title = 	 {Omgaan met veranderende requirements in outsourcing-projecten
},
  journal = 	 {Informatie},
  year = 	 2005,
  month =	 dec
}