1. A general class of invulnerable graphs;Boesch;Networks,1972
2. On designing a reliable hierarchical structure;Loodman;SIAM J. Appl. Math.,1977
3. On minimizing the effects of betrayals in a resistance movement;Gunther;Proc. Eighth Manitoba Conference on Numerical Mathematics and Computing,1978
4. the optimum defense against random subversions in a network;Hartnell;Proceedings of the Tenth Southeastern Conference on Combinatorics, Graph Theory, and Computing,1979
5. Command graphs;Simmons;Colloquia Mathematica Societatis Janos Bolyai,1973