Cesim Erten Philip J. Harding Stephen G. Kobourov Kevin Wampler Gary V. Yee GraphAEL: Graph Animations with Evolving Layouts. 98-110 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2912&spage=98 2003 conf/gd/2003 Graph Drawing db/conf/gd/gd2003.html#ErtenHKWY03