@article{10_21136_CPMF_1928_121391,
     author = {\v{C}ech, Eduard},
     title = {O funkc{\'\i}ch $x^s$, $e^x$, $\log x$, $\sin x$, $\cos x$},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {208--216},
     year = {1928},
     volume = {57},
     number = {3-4},
     doi = {10.21136/CPMF.1928.121391},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1928.121391/}
}