1. Ford, L.R. Jr. andD.R. Fulkerson: Flows in Networks. Princeton University Press, Princeton, N.J. 1962.
2. Lawler, E.L.: Combinatorial Optimization: Networks and Matroids. Holt, Rhinehart & Winston, New York 1976.
3. v. Randow, R.: Integer Programming and Related Areas — A Classified, Bibliography, 1978–1981. Lecture in Economics and Math. Systems, 197, Springer, 1982.
4. Welsh, D.J.A.: Matroid Theory. Academic Press, London 1976.