John Daniels;Jim Amsden;Larry Constantine;David E. Delano;Martin Griss;Ivar Jacobson;Else-Marie Östling;Rebecca Wirfs-Brock
Syntropy Limited;IBM;Constantine & Lockwood;AG Communication Systems;Hewlett-Packard;Rational;Icon MediaLab;Wirfs-Brock Associates
Using OCL and UML to Specify System Behavior
Object Modeling with the OCL, The Rationale behind the Object Constraint Language