@misc{PMFA_2020_65_2_a4,
     title = {Jubilea},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {122--124},
     year = {2020},
     volume = {65},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_2020_65_2_a4/}
}