@article{PMFA_1979_24_5_a1,
     author = {Zn\'am, \v{S}tefan and Katri\v{n}\'ak, Tibor},
     title = {P\"atn\'as\v{t} ot\'azok akademikovi {\v{S}tefanovi} {Schwarzovi}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {245--253},
     year = {1979},
     volume = {24},
     number = {5},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1979_24_5_a1/}
}