@article{PMFA_1977__22_5_a2,
     author = {Hor\'ak, Zden\v{e}k},
     title = {P\v{r}ed 250 lety zem\v{r}el {Isaac} {Newton}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {263--269},
     publisher = {mathdoc},
     volume = {22},
     number = {5},
     year = {1977},
     mrnumber = {0485085},
     zbl = {0368.01011},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1977__22_5_a2/}
}