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@article{MAN_1903__57_158101, author = {E.T. Whittaker}, title = {On the partial differential equations of mathematical physics.}, journal = {Mathematische Annalen}, pages = {333--355}, publisher = {mathdoc}, volume = {57}, year = {1903}, zbl = {34.0827.01}, url = {http://geodesic.mathdoc.fr/item/MAN_1903__57_158101/} }
E.T. Whittaker. On the partial differential equations of mathematical physics.. Mathematische Annalen, Tome 57 (1903), pp. 333-355. http://geodesic.mathdoc.fr/item/MAN_1903__57_158101/