@article{GDZPPN002269910,
title = {\"Uber nichtholonome Systeme},
journal = {Mathematische Annalen},
volume = {92},
year = {1924},
pages = {33-41},
zbl = {50.0529.03},
url = {http://dml.mathdoc.fr/item/GDZPPN002269910}
}
Hamel, G. Über nichtholonome Systeme. Mathematische Annalen, Tome 92 (1924) pp. 33-41. http://gdmltest.u-ga.fr/item/GDZPPN002269910/