@article{UM_1999_7_4_a2,
     author = {Durnov\'a, Helena},
     title = {Matemati\v{c}ky v\v{c}era a dnes (4)},
     journal = {U\v{c}itel matematiky},
     pages = {207--214},
     year = {1999},
     volume = {7},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1999_7_4_a2/}
}