@article{PMFA_1967_12_5_a13,
     author = {Du\v{s}ek, Franti\v{s}ek},
     title = {\v{C}tvrt\'y sjezd matematick\'e spole\v{c}nosti v {NDR}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {315--316},
     year = {1967},
     volume = {12},
     number = {5},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1967_12_5_a13/}
}