@article{10_4153_CJM_1978_064_0,
     author = {Labuda, Iwo},
     title = {Discrete {Copies} of {Rings} of {Sets} in {Groups} and {Orlicz-Pettis} {Theorems}},
     journal = {Canadian journal of mathematics},
     pages = {748--755},
     year = {1978},
     volume = {30},
     number = {4},
     doi = {10.4153/CJM-1978-064-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1978-064-0/}
}