@misc{PMFA_1990_35_4_a6,
     title = {Jubilea a zpr\'avy},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {228--236},
     year = {1990},
     volume = {35},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1990_35_4_a6/}
}