@article{10_21136_CPMF_1904_123666,
     author = {Sobotka, Jan},
     title = {O \v{c}ty\v{r}\'uheln{\'\i}ku plo\v{s}e 2. stupn\v{e} opsan\'em},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {2--9},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {1904},
     doi = {10.21136/CPMF.1904.123666},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1904.123666/}
}