Two Trees Which Are Self-intersecting When Drawn Simultaneously.

Markus Geyer Michael Kaufmann Imrich Vrto Two Trees Which Are Self-intersecting When Drawn Simultaneously. 201-210 2005 conf/gd/2005 Graph Drawing http://dx.doi.org/10.1007/11618058_19 db/conf/gd/gd2005.html#GeyerKV05