1. A. Bichara, F. Mazzocca, On a characterization of the Grassmann space representing the lines in an affine space, to appear in Simon Stevin, Belgium.
2. On a characterization of the Grassmann space representing the h-dimensional subspaces in an affine space;Bichara,1981
3. Sull'indipendenza degli assiomi the definiscono gli spazi di Grassmann affini e proiettivi;Bichara,1981
4. On a characterization of the Grassmann space representing the h-dimensional subspaces in a projective space;Bichara,1981
5. Grassmann space;Lo Re;J. Geom.,1981