1. Bloniarz, P.A.: The Complexity of Monotone Boolean Functions and an Algorithm for Finding Shortest Paths in a Graph. MIT LCS TR-238 (1979)
2. Bollobás, B.: Extremal Graph Theory. London: Academic Press 1978
3. Bublitz, S.: Die monotone Formelgröße homogener Funktionen. Diplomarbeit, Universität Bielefeld, 1982
4. Savage, J.E.: An Algorithm for the Computation of Linear Forms. SIAM J. Comput. 3, 150?158 (1974)
5. Savage, J.E.: The Complexity of Computing. New York: John Wiley 1976