@article{VMUMM_1992_3_a15,
     author = {D. Zekovi\'c},
     title = {On motion of an integrable system with non-linear non-holonomic constraint},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {64--66},
     publisher = {mathdoc},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1992_3_a15/}
}