@InProceedings{Seemann:1997:ESA,
  author =       "Jochen Seemann",
  title =        "Extending the {Sugiyama} Algorithm for Drawing {UML}
                  Class Diagrams: Towards Automatic Layout of
                  Object-Oriented Software Diagrams",
  booktitle =    "Proc. Graph Drawing, 5th International Symposium, GD '97,
                  Rome, Italy, September, 1997",
  year =         "1997",
  editor =       "G. DiBattista",
  volume =       "1353",
  series =       "LNCS",
  publisher =    "Springer",
}