@article{GDZPPN002031116, title = {Tensorial Euler-Lagrange expressions and conservation laws.}, journal = {Aequationes mathematicae}, volume = {18}, year = {1978}, pages = {255-291}, zbl = {0418.49041}, url = {http://dml.mathdoc.fr/item/GDZPPN002031116} }
Anderson, Ian M. Tensorial Euler-Lagrange expressions and conservation laws.. Aequationes mathematicae, Tome 18 (1978) pp. 255-291. http://gdmltest.u-ga.fr/item/GDZPPN002031116/