• 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
• Some more results on matrix transform between speed-Maddox spaces over ultrametric fieldsNatarajan, Pinnangudi N.; Aasma, AntsWSEAS transactions on mathematics2025 / p. 542-550 https://doi.org/10.37394/23206.2025.24.54