@article{UM_2004__12_3_a7,
     author = {Zelinka, Bohdan},
     title = {Troj{\'\i} po\v{c}ty a dvoj{\'\i} v\v{e}da},
     journal = {U\v{c}itel matematiky},
     pages = {189--191},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {2004},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/UM_2004__12_3_a7/}
}