FilipczakM. and HorbaczewskaG. (2020) “Some kinds of sparseness on the real line and ideals on ω”, Annales Mathematicae Silesianae, 34(1), pp. 45-50. Available at: https://www.journals.us.edu.pl/index.php/AMSIL/article/view/13631 (Accessed: 15May2024).