@article{DAN_1965_161_1_a8,
     author = {A. G. Kushnirenko},
     title = {An estimate from above for the entropy of a classical dynamical system},
     journal = {Doklady Akademii Nauk},
     pages = {37--38},
     publisher = {mathdoc},
     volume = {161},
     number = {1},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_161_1_a8/}
}