%0 Journal Article %A S.P. LIPSHITZ %T A Solution of the 'Converse Canonical Problem' for Multiple Integrals in the Calculus of Variations %J Aequationes mathematicae %D 1971 %P 288-305 %V 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1971__6_136203/ %F AM2_1971__6_136203