@article{10_21136_CPM_1967_108148,
     author = {Zelinka, Bohdan},
     title = {K jednomu probl\'emu {S.} {M.} {Ulama}},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {219--221},
     publisher = {mathdoc},
     volume = {092},
     number = {2},
     year = {1967},
     doi = {10.21136/CPM.1967.108148},
     mrnumber = {0223247},
     zbl = {0155.35001},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1967.108148/}
}