@article{ZNSL_1995_231_a3,
     author = {V. A. Boichenko and G. A. Leonov},
     title = {Lyapunov's direct method in estimates of topological entropy},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {62--75},
     publisher = {mathdoc},
     volume = {231},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1995_231_a3/}
}