@misc{PMFA_1971_16_1_a4,
     title = {Hilbertovy probl\'emy},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {14},
     year = {1971},
     volume = {16},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1971_16_1_a4/}
}