@article{DBLP:journals/tse/GansnerKNV93,
	author={Emden R. Gansner, 
               Eleftherios Koutsofios, 
               Stephen C. North, 
               Kiem-Phong Vo},
	journal={IEEE Trans. Software Eng.},
	number=3,
	pages={214-230},
	title={A Technique for Drawing Directed Graphs},
	volume=19,
	year=1993,
}