@article{PMFA_1959_4_2_a5,
     author = {Sobolev, S. L. and Ljapunov, A. A.},
     title = {Kybernetika a p\v{r}{\'\i}rodov\v{e}da},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {214--227},
     year = {1959},
     volume = {4},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1959_4_2_a5/}
}