@article{UM_1999_7_3_a3,
     author = {Zelinka, Bohdan},
     title = {\v{C}tvercov\'e matice a jejich \v{c}tverce},
     journal = {U\v{c}itel matematiky},
     pages = {155--159},
     year = {1999},
     volume = {7},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_1999_7_3_a3/}
}