@article{10_2298_TAM170512008K,
     author = {Alexander V. Karapetyan and Alexander S. Kuleshov},
     title = {The {Routh} theorem for mechanical systems with unknown first integrals},
     journal = {Theoretical and applied mechanics},
     pages = {169 },
     year = {2017},
     volume = {44},
     number = {2},
     doi = {10.2298/TAM170512008K},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/TAM170512008K/}
}