@article{10_21136_CPM_1957_117281,
     author = {Pt\'ak, Vlastimil},
     title = {O jedn\'e ot\'azce z teorie aproximac{\'\i}},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {458},
     publisher = {mathdoc},
     volume = {082},
     number = {4},
     year = {1957},
     doi = {10.21136/CPM.1957.117281},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1957.117281/}
}