1. Balinski, M.L.: On the graph structure of convex polyhedra in n-space. Pac. J. Math. 11, 431–434 (1961)
2. Barnette, D.: Graph theorems for manifolds. Israel J. Math. 16, 62–72 (1973)
3. Björner, A.: Topological methods. In: Graham, R.L., Grötschel, M., Lovász, L. (eds.) Handbook of Combinatorics, pp. 1819–1872. North Holland, Amsterdam (1995)
4. Björner, A.: Mixed connectivity properties of polytopes, cell complexes and posets, in preparation
5. Encyclopedia of Mathematics and Its Applications;A. Björner,1993