@misc{UM_1993__1_3_a2,
     title = {D\r{u}le\v{z}it\'e upozorn\v{e}n{\'\i} pro \v{c}leny {Jednoty} \v{c}esk\'ych matematik\r{u} a fyzik\r{u}},
     journal = {U\v{c}itel matematiky},
     publisher = {mathdoc},
     volume = {01},
     number = {3},
     year = {1993},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/UM_1993__1_3_a2/}
}