@misc{Labuda_Iwo_On_1979, author={Labuda, Iwo}, volume={27}, editor={Państwowe Wydawnictwo Naukowe (1951–1992)}, editor={Polska Akademia Nauk.}, number={10}, copyright={Rights Reserved - Restricted Access}, address={Varsovie}, howpublished={online}, year={1979}, publisher={Państwowe Wydawnictwo Naukowe}, language={eng}, title={On discrete copies of rings of sets in groups and Orlicz-Pettis theorem}, type={Text}, }