%0 Journal Article %A Hiroyuki Ito %T The Modell-Weil groups of unirational quasi-elliptic surfaces in characteristic 3. %J Mathematische Zeitschrift %D 1992 %P 1-40 %V 211 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1992__211_3_174428/ %F MZ_1992__211_3_174428