@article{MZM_2006_80_1_a15,
     author = {A. V. Borisov and I. S. Mamaev},
     title = {An {Integrable} {System} with a {Nonintegrable} {Constraint}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {131--134},
     publisher = {mathdoc},
     volume = {80},
     number = {1},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2006_80_1_a15/}
}