@article{DAN_1982_267_3_a13,
     author = {M. P. Kharlamov},
     title = {Regions of possible motion in mechanical systems},
     journal = {Doklady Akademii Nauk},
     pages = {571--573},
     publisher = {mathdoc},
     volume = {267},
     number = {3},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1982_267_3_a13/}
}