Michael Baur Marc Benkert Ulrik Brandes Sabine Cornelsen Marco Gaertler Boris Köpf Jürgen Lerner Dorothea Wagner 463-464 2001 Graph Drawing http://link.springer.de/link/service/series/0558/bibs/2265/22650463.htm db/conf/gd/gd2001.html#BaurBBCGKLW00