%0 Journal Article %A Fernando Rodriguez Villegas %T On the square root of special values of certain L-series. %J Inventiones mathematicae %D 1991 %P 549-574 %V 106 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1991__106_1_143953/ %F IM_1991__106_1_143953