@article{GDZPPN002534991,
title = {Some first integrals of differential equations of motion of a mechanical system.},
journal = {Publications de l'Institut Math\'ematique [Elektronische Ressource]},
volume = {28},
year = {1972},
pages = {157-162},
zbl = {0266.70008},
language = {en},
url = {http://dml.mathdoc.fr/item/GDZPPN002534991}
}
Vujicic, V.A. Some first integrals of differential equations of motion of a mechanical system.. Publications de l'Institut Mathématique [Elektronische Ressource], Tome 28 (1972) pp. 157-162. http://gdmltest.u-ga.fr/item/GDZPPN002534991/