@article{PMFA_1977_22_4_a5,
     author = {Randa, Miroslav},
     title = {K problematice matematiky a mechaniky},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {220--222},
     year = {1977},
     volume = {22},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1977_22_4_a5/}
}