1. Bertsekas, D.P.: Nonlinear Programming, 2nd edn. Athena Scientific (1999)
2. Boisvert, R., Pozo, R., Remington, K., Barrett, R., Dongarra, J.: The Matrix Market: A web resource for test matrix collections. In: Quality of Numerical Software, Assessment and Enhancement, pp. 125–137. Chapman Hall, Boca Raton (1997)
3. Carmel, L., Harel, D., Koren, Y.: Combining Hierarchy and Energy for Drawing Directed Graphs. IEEE Trans. Visualization and Computer Graphics 10, 46–57 (2004)
4. Dwyer, T., Koren, Y., Marriott, K.: Stress Majorization with Orthogonal Ordering Constraints. Technical Report 2005/175, Monash University School of Computer Science and Software Engineering (2005), Available from:
www.csse.monash.edu.au/~tdwyer
5. Dwyer, T., Koren, Y.: Dig-CoLa: Directed Graph Layout through Constrained Energy Minimization. In: IEEE Symposium on Information Visualization, Infovis 2005 (2005) (to appear)