1. Comparison of orders of approximation of Fourier expansions by different matrix methods;Aasma;Facta Univ. Ser. Math. Inform,1997
2. Matrix transformations of λ-boundedness fields of normal matrix methods;Aasma;Stud. Sci. Math. Hung,1999
3. On the summability of Fourier expansions in Banach spaces;Aasma;Proc. Estonian Acad. Sci. Phys. Math,2002
4. Aasma , A. Convergence acceleration and improvement by regular matrices Dutta , H. Rhoades , B.E. Current Topics in Summability Theory and Applications 141 180 Springer Singapore 2016
5. The modulus of continuity of Fourier series transformed by convex multipliers (Serbo-Croatian);Aljanǎić;Acad. Serbe Sci. Arts Glas,1963