%0 Journal Article %A Pilar Bayer %A Gerhard Frey %T Galois representations of octahedral type and 2-coverings of elliptic curves. %J Mathematische Zeitschrift %D 1991 %P 395-408 %V 207 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1991__207_2_174278/ %F MZ_1991__207_2_174278