@misc{Węglorz_Bogdan_Extensions_1979, author={Węglorz, Bogdan}, volume={27}, editor={Polska Akademia Nauk.}, editor={Państwowe Wydawnictwo Naukowe (1951–1992)}, number={1}, copyright={Rights Reserved - Restricted Access}, address={Varsovie}, howpublished={online}, year={1979}, publisher={Państwowe Wydawnictwo Naukowe}, language={eng}, title={Extensions of filters to Ulam filters}, type={Text}, }