@InProceedings{Mellor:1999:UML98,
  author =       "Stephen J. Mellor and Stephen R. Tockey and Rodolphe
                  Arthaud and Philippe LeBlanc",
  title =        "An Action Language for {UML}: Proposal for a Precise
                  Execution Semantics",
  pages =        "307--318",
  booktitle =    "The Unified Modeling Language, UML'98 - Beyond the
                  Notation. First International Workshop, Mulhouse, France,
                  June 1998, Selected Papers",
  editor =       "Jean B{\'e}zivin and Pierre-Alain Muller",
  publisher =    "Springer",
  series =       "LNCS",
  volume =       "1618",
  year =         "1999",
}