Christian Bachmaier Franz-Josef Brandenburg Michael Forster Paul Holleis Marcus Raitner Gravisto: Graph Visualization Toolkit. 502-503 http://dx.doi.org/10.1007/978-3-540-31843-9_52 2004 conf/gd/2004 Graph Drawing db/conf/gd/gd2004.html#BachmaierBFHR04