@Misc{Warmer+01,
  author = {Jos Warmer and Anneke Kleppe and Tony Clark and Anders Ivner and Jonas H{\"o}gstr{\"o}m and Martin Gogolla and Mark Richters and Heinrich Hu{\ss}mann and Steffen Zschaler and Simon Johnston and 
            David S. Frankel and Conrad Bock},
  title  = {Object Constraint Language 2.0},
  note   = {Response to the OMG RfP},
  year   = 2001,
}