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@article{MAN_1908__65_158359, author = {Philip E.B. Jourdain}, title = {On those {Principles} of {Mechanics} which depend upon {Processes} of {Variation}}, journal = {Mathematische Annalen}, pages = {513--527}, publisher = {mathdoc}, volume = {65}, year = {1908}, zbl = {38.0695.02}, url = {http://geodesic.mathdoc.fr/item/MAN_1908__65_158359/} }
Philip E.B. Jourdain. On those Principles of Mechanics which depend upon Processes of Variation. Mathematische Annalen, Tome 65 (1908), pp. 513-527. http://geodesic.mathdoc.fr/item/MAN_1908__65_158359/