@article{10_21136_CPMF_1911_124042,
     author = {Langr, Josef},
     title = {Drobnosti z geometrie troj\'uheln{\'\i}ka},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {505--510},
     publisher = {mathdoc},
     volume = {40},
     number = {4},
     year = {1911},
     doi = {10.21136/CPMF.1911.124042},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1911.124042/}
}