@misc{PMFA_1968_13_4_a5,
     title = {Zpr\'avy a jubilea},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {255--256},
     year = {1968},
     volume = {13},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1968_13_4_a5/}
}