@article{TRSPY_2017_297_a12,
     author = {S. P. Kuznetsov and V. P. Kruglov},
     title = {On some simple examples of mechanical systems with hyperbolic chaos},
     journal = {Informatics and Automation},
     pages = {232--259},
     publisher = {mathdoc},
     volume = {297},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2017_297_a12/}
}