1. Morphisms for the strong Sperner property of Stanley and Griggs;Linear and Multilinear Algebra;1984-12
2. The Sperner Property;Orders: Description and Roles - In Set Theory, Lattices, Ordered Groups, Topology, Theory of Models and Relations, Combinatorics, Effectiveness, Social Sciences, Proceedings of the Conference on Ordered Sets and their Application Château dc la Tourcttc; Ordres: Description et Rôles - En Théorie des Treillis, des Groupes Ordonnés; en Topologie, Théorie des Modèles et des Relations, Cornbinatoire, Effectivité, Sciences Sociales, Actes de la Conférence sur ies Ensembles Ordonnés et leur Applications Château de la Tourette;1984
3. Extremal Problems in Partially Ordered Sets;Ordered Sets;1982
4. Semiantichains and Unichain Coverings in Direct Products of Partial Orders;SIAM Journal on Algebraic Discrete Methods;1981-09
5. The global theory of flows in networks;Advances in Applied Mathematics;1980-06