@article{DAN_1997_354_3_a4,
     author = {O. E. Orel},
     title = {The integrable {Euler} and {Jacobi} problems are not topologically},
     journal = {Doklady Akademii Nauk},
     pages = {307--309},
     year = {1997},
     volume = {354},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1997_354_3_a4/}
}