@article{10_21136_CPMF_1936_120838,
     author = {Zippin, Leo},
     title = {On a problem of {\v{C}ech}},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {49--52},
     year = {1936},
     volume = {65},
     number = {2},
     doi = {10.21136/CPMF.1936.120838},
     zbl = {0013.28205},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1936.120838/}
}