@misc{PMFA_1989_34_4_a4,
     title = {Jubilees and news},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {243--244},
     year = {1989},
     volume = {34},
     number = {4},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1989_34_4_a4/}
}