%0 Journal Article %A Teresa Crespo %T C4-Extensions of Sn as Galois Groups. %J Mathematica Scandinavica %D 1995 %P 214-220 %V 76 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1995__76_2_167338/ %F MS2_1995__76_2_167338