@article{FPM_2006_12_5_a5,
     author = {M. F. Kondrat'eva and T. A. Osborn},
     title = {On the notion of quantum {Lyapunov} exponent},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {65--74},
     publisher = {mathdoc},
     volume = {12},
     number = {5},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2006_12_5_a5/}
}