1. D. Jungnickel, Algorithm and Computation in Mathematics, vol. 5 (Springer, Heidelberg, 1999)
2. J. Wardrop, Proc. Inst. Civ. Eng. 1, 325 (1952)
3. R. Ahuja, T. Magnanti, J. Orlin, Network Flows (Prentice Hall, New Jersey, 1993)
4. G. Kirchoff, Ann. Phys. und Chemie 72, 497 (1847)
5. P. Doyle, J. Snell, The Mathematical Association of America (USA, 1984), pp. 83–149