@article{RM_2009_64_4_a3,
     author = {A. Yu. Kolesov and N. Kh. Rozov},
     title = {On the definition of `chaos'},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {701--744},
     year = {2009},
     volume = {64},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2009_64_4_a3/}
}