@article{PMFA_1975_20_5_a4,
     author = {Frei, V\'aclav},
     title = {O osmn\'act\'em {Hilbertov\v{e}} probl\'emu},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {260--268},
     year = {1975},
     volume = {20},
     number = {5},
     mrnumber = {0493705},
     zbl = {0314.50007},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1975_20_5_a4/}
}