@misc{PMFA_2023_68_1_a4,
     title = {Jubilea},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {66--68},
     year = {2023},
     volume = {68},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_2023_68_1_a4/}
}