@misc{PMFA_1976__21_4_a6,
     title = {Jubilea a zpr\'avy},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {223--228},
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {1976},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1976__21_4_a6/}
}