@misc{PMFA_1970_15_5_a6,
     title = {Jubilea},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {236--242},
     year = {1970},
     volume = {15},
     number = {5},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1970_15_5_a6/}
}