Absolute convergence with speed and matrix transformsAasma, Ants; Natarajan, Pinnangudi N.TWMS Journal of applied and engineering mathematics2024 An introductory course in summability theoryAasma, Ants; Dutta, Hemen; Natarajan, Pinnangudi N.2017 Matrix transforms between sequence spaces defined by speeds of convergence : abstractAasma, Ants; Natarajan, Pinnangudi N.Filomat2023 / 1 p Matrix transforms between subspaces of summability do-mains of matrices determined by speed of convergenceAasma, Ants; Natarajan, Pinnangudi N.Indian Journal of Mathematics2023 Matrix transforms of subspaces of summability domains of matrices defined by speed of convergenceAasma, Ants; Natarajan, Pinnangudi N.Filomat2023 https://journal.pmf.ni.ac.rs/filomat/index.php/filomat/article/view/21559 Matrix transforms of subspaces of summability domains of normal matrices determined by speedAasma, Ants; Natarajan, Pinnangudi N.Facta Universitatis, Series : Mathematics and Informatics2022 / p. 773-782 http://casopisi.junis.ni.ac.rs/index.php/FUMathInf/article/view/10761