%0 Journal Article %A Jan Okni/nski %T The algebra of the subspace semigroup of $M_{2}({\Bbb F}_q)$ %J Colloquium Mathematicum %D 2002 %P 131-139 %V 92 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm92-1-11/ %R 10.4064/cm92-1-11 %G en %F 10_4064_cm92_1_11