@article{MAN_1906__62_158266,
     author = {Philip E.B. Jourdain},
     title = {The derivation of {Equations} in {Generalised} {Coordinates} from the {Principle} of {Least} {Action} and allied {Principles}},
     journal = {Mathematische Annalen},
     pages = {413--418},
     publisher = {mathdoc},
     volume = {62},
     year = {1906},
     zbl = {37.0722.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1906__62_158266/}
}