@article{UM_2011_19_4_a2,
     author = {Hrub\'y, Dag},
     title = {Troj\'uheln{\'\i}k v {Gaussov\v{e}} rovin\v{e}},
     journal = {U\v{c}itel matematiky},
     pages = {209--221},
     year = {2011},
     volume = {19},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_2011_19_4_a2/}
}