@article{10_21136_CPMF_1940_120965,
     author = {Peterkov\'a-Dosko\v{c}ilov\'a, Milada},
     title = {Troj\'uheln{\'\i}k},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {D177},
     publisher = {mathdoc},
     volume = {69},
     number = {Suppl.},
     year = {1940},
     doi = {10.21136/CPMF.1940.120965},
     language = {cz},
     url = {https://geodesic-test.mathdoc.fr/articles/10.21136/CPMF.1940.120965/}
}