@article{10_21136_CPMF_1923_123265,
     author = {Seifert, Ladislav},
     title = {O \'uhlu dvou rovin v prostoru \v{c}ty\v{r}rozm\v{e}rn\'em},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {138--148},
     publisher = {mathdoc},
     volume = {52},
     number = {1-2},
     year = {1923},
     doi = {10.21136/CPMF.1923.123265},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1923.123265/}
}