1. K. Baclawski, Canonical module of partially ordered sets (manuscript).
2. A homological theory of complexes of modules;Foxby,1981
3. Der kanonische Modul eines Cohen-Macaulay-Rings;Herzog,1971
4. M. Hochster to R. P. Stanley (June 30, 1976).
5. Topological results in combinatorics;Munkres,1976