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@article{AM2_1978__17_136745, author = {Ian M. Anderson}, title = {Tensorial {Euler-Lagrange} expressions and conservation laws.}, journal = {Aequationes mathematicae}, pages = {255--291}, publisher = {mathdoc}, volume = {17}, year = {1978}, zbl = {0418.49041}, url = {http://geodesic.mathdoc.fr/item/AM2_1978__17_136745/} }
Ian M. Anderson. Tensorial Euler-Lagrange expressions and conservation laws.. Aequationes mathematicae, Tome 17 (1978), pp. 255-291. http://geodesic.mathdoc.fr/item/AM2_1978__17_136745/