@article{TMF_1993_97_3_a5,
     author = {A. Yu. Boldin and R. A. Sharipov},
     title = {Dynamical systems that admit normal displacement},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {386--395},
     publisher = {mathdoc},
     volume = {97},
     number = {3},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1993_97_3_a5/}
}