Kartal, Bağdagül. “Necessary and Sufficient Conditions for the Inclusion Relation Between Two Summability Methods”. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica 22 (March 28, 2023): 5–11. Accessed July 21, 2026. https://studmath.uken.krakow.pl/article/view/10153.