@article{DAN_1965_160_4_a11,
     author = {Yu. I. Neimark and N. A. Fufaev},
     title = {On the stability of equilibrium states of non-holonomic systems},
     journal = {Doklady Akademii Nauk},
     pages = {781--784},
     publisher = {mathdoc},
     volume = {160},
     number = {4},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_160_4_a11/}
}