@InProceedings{Barros:2003:WRKUMLAOSD,
  author =       "Jo{\~a}o Paulo Barros and Luis Gomes",
  title =        "Towards the Support for Crosscutting Concerns in Activity
                  Diagrams: a Graphical Approach",
  booktitle =    "The 4th AOSD Modeling With UML Workshop",
  editor =       "Faisal Akkawi and Omar Aldawud and Grady Booch and
                  Siobh{\'a}n Clarke and Jeff Gray and Bill Harrison and
                  Mohamed Kand{\'e} and Dominik Stein and Peri Tarr and
                  Aida Zakaria",
  publisher =    "",
  year =         "2003",
}