@article{PMFA_1958__3_2_a4,
     author = {Gregor, Ji\v{r}{\'\i}},
     title = {Dynamick\'e syst\'emy s regul\'arn{\'\i} pravou stranou. {I}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {153--160},
     publisher = {mathdoc},
     volume = {03},
     number = {2},
     year = {1958},
     zbl = {0081.30802},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1958__3_2_a4/}
}