1. Whitney numbers;Aigner,1987
2. A proof of the sufficiency of McMullen's conditions for f-vectors of simplicial convex polytopes;Billera;J. Combin. Theory Ser. A,1981
3. The unimodality conjecture for convex polytopes;Björner;Bull. Amer. Math. Soc.,1981
4. The homology and shellability of matroids and geometric lattices;Björner,1992
5. Log-concave and unimodal sequences in algebra, combinatorics, and geometry: an update;Brenti,1994