@article{GDZPPN002261111,
title = {The derivation of Equations in Generalised Coordinates from the Principle of Least Action and allied Principles},
journal = {Mathematische Annalen},
volume = {62},
year = {1906},
pages = {413-418},
zbl = {37.0722.01},
url = {http://dml.mathdoc.fr/item/GDZPPN002261111}
}
Jourdain, Philip E.B. The derivation of Equations in Generalised Coordinates from the Principle of Least Action and allied Principles. Mathematische Annalen, Tome 62 (1906) pp. 413-418. http://gdmltest.u-ga.fr/item/GDZPPN002261111/