1. Number of Outside Corners of Monomial Ideals;Agnarsson;J. Pure Appl. Algebra,1997
2. Monomial Resolutions;Bayer;Math. Res. Lett.,1998
3. Concerning a Certain Set of Arrangements;Dushnik,1950
4. Interval Orders and Shift Graphs;Füredi;Colloq. Math. Soc. Janos Bolyai,1991