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• 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 subspaces of summability domains of matrices defined by speed of convergenceAasma, Ants; Natarajan, Pinnangudi N.Filomat2023 / p. 10209-10218 https://journal.pmf.ni.ac.rs/filomat/index.php/filomat/article/view/21559 https://doi.org/10.2298/FIL2330209A https://www.scopus.com/sourceid/19900192450 https://www.scopus.com/record/display.uri?eid=2-s2.0-85196651281&origin=inward&txGid=cd8568240e33cf7106b0c9fd23672624 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=FILOMAT&year=2023 https://www.webofscience.com/wos/woscc/full-record/WOS:001102103400001
• On a cosine operator function framework of approximation processes in banach spaceKivinukk, Andi; Saksa, Anna; Zeltser, MariaFilomat2019 / p. 4213-4228 https://doi.org/10.2298/FIL1913213K https://www.scopus.com/sourceid/19900192450 https://www.scopus.com/record/display.uri?eid=2-s2.0-85077677690&origin=inward&txGid=e4b38d2a8efeb245b0d39899ba63f264 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=FILOMAT&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000502092100018
• Some classes of matrix transforms connected with subspaces of Maddox spaces defined by speeds of convergenceNatarajan, Pinnangudi N.; Aasma, AntsFilomat2024 / p. 8039-8046 https://doi.org/10.2298/FIL2423039N https://www.pmf.ni.ac.rs/filomat-content/2024/38-23/38-23-3-24287.pdf
• Some classes of matrix transforms of summability domains of normal matricesAasma, AntsFilomat2012 / p. 1023-1028 https://www.researchgate.net/publication/268007500_Some_classes_of_matrix_transforms_of_summability_domains_of_normal_matrices