@article{UM_2014__22_4_a5,
     author = {Calda, Emil},
     title = {Dva \v{c}tverce v rovnostrann\'em troj\'uheln{\'\i}ku},
     journal = {U\v{c}itel matematiky},
     pages = {252--256},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {2014},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/UM_2014__22_4_a5/}
}