1. The Theory of Partitions;Andrews,1976
2. Cohen-Macaulay ordered sets;Baclawski;J. Algebra,1980
3. K. Baclawski, Cohen-Macaulay connectivity and geometric lattices, preprint.
4. Fixed points in partially ordered sets;Baclawski;Advances in Math.,1979
5. Lattice Theory;Birkhoff,1967