@article{PMFA_1974_19_1_a0,
     author = {\'Ulehla, Ivan},
     title = {Probl\'em pozn\'an{\'\i} ve fyzice},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {1--10},
     year = {1974},
     volume = {19},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1974_19_1_a0/}
}