@article{10_21136_CPM_1968_117615,
     author = {\v{S}tefan, Peter},
     title = {On the proof of a theorem of {V.} {G.} {Boltianskij}},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {341--345},
     publisher = {mathdoc},
     volume = {093},
     number = {3},
     year = {1968},
     doi = {10.21136/CPM.1968.117615},
     mrnumber = {0256244},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1968.117615/}
}