@article{UM_2008_16_3_a2,
     author = {Mach\'a\v{c}ek, Miroslav},
     title = {S {Cabri} do taj\r{u} {Loba\v{c}evsk\'eho} geometrie},
     journal = {U\v{c}itel matematiky},
     pages = {160--170},
     year = {2008},
     volume = {16},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_2008_16_3_a2/}
}