@misc{PMFA_1975_20_4_a12,
     title = {Obsah},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {240},
     year = {1975},
     volume = {20},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1975_20_4_a12/}
}