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@article{AM2_1971__6_136203, author = {S.P. LIPSHITZ}, title = {A {Solution} of the {'Converse} {Canonical} {Problem'} for {Multiple} {Integrals} in the {Calculus} of {Variations}}, journal = {Aequationes mathematicae}, pages = {288--305}, publisher = {mathdoc}, volume = {6}, year = {1971}, zbl = {0223.49017}, url = {http://geodesic.mathdoc.fr/item/AM2_1971__6_136203/} }
S.P. LIPSHITZ. A Solution of the 'Converse Canonical Problem' for Multiple Integrals in the Calculus of Variations. Aequationes mathematicae, Tome 6 (1971), pp. 288-305. http://geodesic.mathdoc.fr/item/AM2_1971__6_136203/