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@article{AM2_1971__7_136253, author = {K.P. HADELER}, title = {Non-Quadratic {Variational} {Problems}}, journal = {Aequationes mathematicae}, pages = {199--210}, publisher = {mathdoc}, volume = {7}, year = {1971}, zbl = {0232.49011}, url = {http://geodesic.mathdoc.fr/item/AM2_1971__7_136253/} }
K.P. HADELER. Non-Quadratic Variational Problems. Aequationes mathematicae, Tome 7 (1971), pp. 199-210. http://geodesic.mathdoc.fr/item/AM2_1971__7_136253/