@article{PMFA_1972_17_5_a2,
     author = {Nov\'ak, B\v{r}etislav},
     title = {O sedm\'em {Hilbertov\v{e}} probl\'emu},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {245--256},
     year = {1972},
     volume = {17},
     number = {5},
     mrnumber = {0485719},
     zbl = {0251.10025},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1972_17_5_a2/}
}