@article{AIHPA_1966__5_4_281_0,
     author = {Niang, S.},
     title = {Potentiel g\'en\'eralis\'e $U (\dot{q}^\nu , q^\nu ; t)$. {Existence} et d\'etermination},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {281--299},
     publisher = {Gauthier-Villars},
     volume = {5},
     number = {4},
     year = {1966},
     zbl = {0189.24402},
     language = {fr},
     url = {http://www.numdam.org/item/AIHPA_1966__5_4_281_0/}
}