@article{10_21136_CPMF_1921_123799,
     author = {\v{C}ech, Eduard},
     title = {O k\v{r}ivkov\'em a plo\v{s}n\'em elementu t\v{r}et{\'\i}ho \v{r}\'adu projektivn{\'\i}ho prostoru},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {219--249},
     publisher = {mathdoc},
     volume = {50},
     number = {4-5},
     year = {1921},
     doi = {10.21136/CPMF.1921.123799},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1921.123799/}
}