Ugur Dogrusöz Konstantinos G. Kakoulis Brendan Madden Ioannis G. Tollis Edge Labeling in the Graph Layout Toolkit. 356-363 1998 conf/gd/1998 Graph Drawing http://link.springer.de/link/service/series/0558/bibs/1547/15470356.htm db/conf/gd/gd98.html#DogrusozKMT98