@article{PMFA_1960_5_4_a5,
     author = {Pi\v{s}l, Milan},
     title = {Logaritmick\'a spir\'ala},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {416--423},
     year = {1960},
     volume = {5},
     number = {4},
     zbl = {0104.15102},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1960_5_4_a5/}
}