1. λ1 isoperimetric inequalities and superconcentrators;Alon;J. Combin. Theory (B),1985
2. Maximally connected arrays on the n-cube;Bernstein;SIAM J. Appl. Math,1967
3. Combinatorias: Set Systems, Hypergraphs, Families of Vectors and Combinatorial Probability;Bollobás,1986
4. B. Bollobas, I. Leader: Compressions and isoperimetric inequalities, to appear in J. Combin. Theory (A).
5. Optimal assignments of numbers to vertices;Harper;J. Soc. Indust. Appl. Math,1964