1. On set systems not containing delta systems;Abbott;Graphs and Combinatorics,1992
2. H. L. Abbott, B. Gardner, 1969, Remark on a combinatorial theorem of Erdős and Rado, Recent Progress in Combinatorics, W. T. Tutte, Academic Press, New York
3. Intersection theorems for systems of sets;Abbott;J. Comb. Theor. Ser. A,1972
4. On finiteΔ;Abbott;Discrete Math.,1974
5. On finiteΔ;Abbott;Discrete Math.,1977