de Nooy, W., Mrvar, A.,, Batagelj, V. (2005). Exploratory Social Network Analysis with Pajek. New York, NY, USA: Cambridge University Press. ISBN: 0521602629

Ellson, J., Gansner, E., Koutsofios, E., North, S. & Woodhull, G. (2004). Graphviz and Dynagraph -- Static and Dynamic Graph Drawing Tools. In M. Junger & P. Mutzel (ed.), Graph Drawing Software (pp. 127--148) . Springer-Verlag . ISBN: 3-540-00881-0.