• Matrix transforms into the set of a-absolutely convergent sequences with speed and the regularity of matrices on the sub-spaces of CAasma, Ants; Natarajan, Pinnangudi N.WSEAS transactions on mathematics2024 / p. 60-67 https://doi.org/10.37394/23206.2024.23.7
• Matrix transforms into the speed-Maddox spaces over ultrametric fieldsNatarajan, Pinnangudi; Aasma, AntsAnalele Stiintifice ale Universitatii Al I Cuza din Iasi - Matematica2025 / p. 71-79 https://doi.org/10.47743/anstim.2025.00006 https://www.math.uaic.ro/~annalsmath/pdf-uri_anale/F1(2025)/6%20F1%202025.pdf
• Matrix transforms into the subsets of Maddox spaces defined by speedNatarajan, Pinnangudi N.; Aasma, AntsWSEAS transactions on mathematics2025 / p. 82-89 https://doi.org/10.37394/23206.2025.24.11
• Matrix transforms of A-statistically convergent sequences with speedAasma, AntsFilomat2013 / p. 1385-1392 https://doi.org/10.2298/FIL1308385A https://www.scopus.com/sourceid/19900192450 https://www.scopus.com/record/display.uri?eid=2-s2.0-84888406368&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.2298%2FFIL1308385A%29 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=FILOMAT&year=2013 https://www.webofscience.com/wos/woscc/full-record/WOS:000329319100002
• Matrix transforms of α -absolutely Aλ -summable sequencesAasma, Ants; Natarajan, Pinnangudi N.WSEAS transactions on mathematics2024 / p. 836-847 https://doi.org/10.37394/23206.2024.23.92
• Some Classes of Matrix Transformations between the Subsets of Maddox Spaces Defined by SpeedAasma, Ants; Natarajan, Pinnangudi N.WSEAS transactions on systems2024 / p. 508-516 https://doi.org/10.37394/23202.2024.23.52 https://wseas.com/journals/systems/2024/b065102-034(2024).pdf