@misc{UM_1997_5_2_a11,
     title = {Drogy},
     journal = {U\v{c}itel matematiky},
     pages = {128},
     year = {1997},
     volume = {5},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1997_5_2_a11/}
}