@misc{UM_1994_2_3_a19, title = {Ozn\'amen{\'\i}}, journal = {U\v{c}itel matematiky}, pages = {53--54}, year = {1994}, volume = {2}, number = {3}, language = {cs}, url = {http://geodesic.mathdoc.fr/item/UM_1994_2_3_a19/} }