@article{UM_2000_8_4_a2,
     author = {Ra\v{c}kov\'a, Martina},
     title = {Dvojit\'e meradlo alebo rebr{\'\i}k},
     journal = {U\v{c}itel matematiky},
     pages = {209--213},
     year = {2000},
     volume = {8},
     number = {4},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/UM_2000_8_4_a2/}
}