%0 Journal Article %A Suleiman, Ibrahim A.I. %A Wilson, Robert A. %T Construction of the fourfold cover of the Mathieu group . %J Experimental mathematics %D 1993 %P 11-14 %V 2 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/EXMA_1993__2_1_228443/ %G en %F EXMA_1993__2_1_228443