Ioannis G. Tollis Maurizio Patrignani Graph Drawing, 16th International Symposium, GD 2008, Heraklion, Crete, Greece, September 21-24, 2008. Revised Papers 5417 2009 https://doi.org/10.1007/978-3-642-00219-9 978-3-642-00218-2 GD Lecture Notes in Computer Science Springer db/conf/gd/gd2008.html