1. BICHARA,A. and TALLINI, G.: On a characterization of the Grassmann manifold representing the planes in a projective space. Combinatorial and geometric structures and their applications (Trento, 1980), Ann. Discr. Math. 14 (1982), 129?149.
2. BICHARA, A. and TALLINI, G.: On a characterization of Grassmann space representing the h-dimensional subspaces in a projective space. Combinatorics '81 (Rome, 1981), Ann. Discr. Math.18 (1983), 113?131.
3. BOURBAKI, N.: Topologie générale. 3ème ed., Chap. 5?8, Hermann, Paris, 1963.
4. DOIGNON, J.-P.: Sur les espaces projectifs topologiques. Math. Z.122 (1971), 57?60.
5. GROH, H.: Geometric lattices with topology. J. Comb. Theory Ser. A42 (1986), 111?125.