1. http://www.cs.ucl.ac.uk/staff/V.Kolmogorov/software.html (Blossom V code, version 1.0)
2. http://www.iwr.uni-heidelberg.de/groups/comopt/software/tsplib95/tsp/
3. http://www.tsp.gatech.edu/vlsi/index.html
4. Ahuja R.K., Magnanti T.L., Orlin J.B.: Network Flows: Theory, Algorithms, and Applications. Prentice Hall, Englewood Cliffs (1993)
5. Applegate, D., Cook, W.: Solving large-scale matching problems. Network Flows and Matchings. DIMACS Series in Discrete Mathematics and Theoretical Computer Science, vol. 12, pp. 557–576 (1993)