@article{PMFA_1971_16_2_a3,
     author = {Slav{\'\i}\v{c}ek, Emil},
     title = {O jednotk\'ach rovinn\'eho a prostorov\'eho \'uhlu},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {72--78},
     year = {1971},
     volume = {16},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1971_16_2_a3/}
}