@article{10_21136_CMJ_1984_101960,
     author = {Narkiewicz, W{\l}adys{\l}aw and \v{S}al\'at, Tibor},
     title = {A theorem of {H.} {Steinhaus} and $(R)$-dense sets of positive integers},
     journal = {Czechoslovak Mathematical Journal},
     pages = {355--361},
     publisher = {mathdoc},
     volume = {34},
     number = {3},
     year = {1984},
     doi = {10.21136/CMJ.1984.101960},
     mrnumber = {761418},
     zbl = {0557.10039},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1984.101960/}
}