Carla Binucci Walter Didimo Giuseppe Liotta Maddalena Nonato Labeling Heuristics for Orthogonal Drawings. 139-153 2001 conf/gd/2001 Graph Drawing http://link.springer.de/link/service/series/0558/bibs/2265/22650139.htm db/conf/gd/gd2001.html#BinucciDLN01