@misc{PMFA_1989_34_2_a7,
     title = {Jubilea a zpr\'avy},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {117--119},
     year = {1989},
     volume = {34},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1989_34_2_a7/}
}