@InCollection{BCGR09b,
  author = {Manfred Broy and Mar\'{\i}a Victoria Cengarle and
            Hans Gr{\"o}nniger and Bernhard Rumpe},
  editor = {Kevin Lano},
  title = {{Definition of the System Model}},
  booktitle = {{UML 2 Semantics and Applications}},
  pages = "61--93",
  publisher = {John Wiley \& Sons},
  address = {Hoboken},
  year = 2009,
  url = {http://www3.interscience.wiley.com/cgi-bin/booktext/122654114/BOOKPDFSTART},
}