@article{EXMA_1993__2_1_228443,
     author = {Suleiman, Ibrahim A.I. and Wilson, Robert A.},
     title = {Construction of the fourfold cover of the {Mathieu} group .},
     journal = {Experimental mathematics},
     pages = {11--14},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1993},
     zbl = {0805.20014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMA_1993__2_1_228443/}
}