Cesim Erten Stephen G. Kobourov Vu Le Armand Navabi Simultaneous Graph Drawing: Layout Algorithms and Visualization Schemes. 165-182 2005 9 J. Graph Algorithms Appl. 1 http://jgaa.info/accepted/2005/Erten+2005.9.1.pdf db/journals/jgaa/jgaa9.html#ErtenKLN05