1. L. Buti, G. Di Battista, G. Liotta, E. Tassinari, F. Vargiu, and L. Vismara. GD-workbench: a system for prototyping and testing graph drawing algorithms. Graph Drawing (Proc. GD '95). LNCS, 1027:76–87, 1996. F. J. Brandenburg, Ed.
2. G. Di Battista, A. Garg, G. Liotta, R. Tamassia, E. Tassinari, and F. Vargiu. An experimental comparison of four graph drawing algorithms. Comput. Geom. Theory Appl., 1996. to appear.
3. M. Himsolt. GML: Graph Modelling Language. Manuscript, Universität Passau, Innstraße 33, 94030 Passau, Germany, 1996. Available at http://www.uni-passau.de/∼himsolt/Graphlet/GML.
4. E. Koutsofios and S. North. Drawing graphs with dot. Technical report, AT&T Bell Laboratories, Murray Hill, NJ., 1995. dot user's manual. Available at http://www.research.att.com/dist/drawdag.
5. S. North. 5114 directed graphs, 1995. Manuscript. Available at ftp.research.att.com/dist/drawdag.