@article{PMFA_1982__27_5_a4,
     author = {Halmos, Paul R.},
     title = {J\'adro matematiky},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {273--281},
     publisher = {mathdoc},
     volume = {27},
     number = {5},
     year = {1982},
     mrnumber = {0682902},
     zbl = {0498.00013},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1982__27_5_a4/}
}