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@article{ARM_1988__24_1_a2, author = {Horov\'a, Ivana}, title = {On the variational principles for partial differential equations}, journal = {Archivum mathematicum}, pages = {17--23}, publisher = {mathdoc}, volume = {24}, number = {1}, year = {1988}, mrnumber = {983004}, zbl = {0675.35003}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1988__24_1_a2/} }
Horová, Ivana. On the variational principles for partial differential equations. Archivum mathematicum, Tome 24 (1988) no. 1, pp. 17-23. http://geodesic.mathdoc.fr/item/ARM_1988__24_1_a2/