@article{UM_2009__17_1_a7,
     author = {Calda, Emil},
     title = {Co mus{\'\i} (?) obsahovat u\v{c}ebnice},
     journal = {U\v{c}itel matematiky},
     pages = {53--55},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {2009},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/UM_2009__17_1_a7/}
}