@article{UM_1994_2_3_a13,
     author = {Richter, V\'aclav},
     title = {Perli\v{c}ky z lavic i od tabule},
     journal = {U\v{c}itel matematiky},
     pages = {35--36},
     year = {1994},
     volume = {2},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1994_2_3_a13/}
}