@article{10_4064_sm_17_3_335_348,
     author = {K. Urbanik},
     title = {Effective processes in the sense of {H.} {Steinhaus}},
     journal = {Studia Mathematica},
     pages = {335--348},
     year = {1958},
     volume = {17},
     number = {3},
     doi = {10.4064/sm-17-3-335-348},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-17-3-335-348/}
}