Do you mean visualising the tree by citations? All of these help, but papercube has a good following. http://flowingdata.com/2012/01/01/visualizing-citations-i

Do you mean visualising the tree by citations? All of these help, but papercube has a good following. http://flowingdata.com/2012/01/01/visualizing-citations-in-research-literature/ http://flowingdata.com/2012/01/01/visualizing-citations-in-r... http://webapps.stackexchange.com/questions/10058/visualization-of-citation-data http://webapps.stackexchange.com/questions/10058/visualizati... http://papercube.peterbergstrom.com/ http://papercube.peterbergstrom.com/ http://www.cs.umd.edu/hcil/ase/ http://www.cs.umd.edu/hcil/ase/