@InProceedings{Akehurst:2004:WRKUMLOMDE,
  author =       "David Akehurst",
  title =        "Relations in {OCL}",
  pages =        "16--29",
  booktitle =    "OCL and Model Driven Engineering, {UML} 2004 Conference
                  Workshop, October 12, 2004, Lisbon, Portugal",
  editor =       "Octavian Patrascoiu",
  publisher =    "University of Kent",
  year =         "2004",
}