On improvement and acceleration of convergence by regular matrix methodsAasma, AntsApproximations, harmonic analysis, operators and sequences : research communications of the workshop held in Narva-Jõesuu, Estonia, October 3-5, 20082008 / p. 26-28 https://www.researchgate.net/publication/228980432_On_the_acceleration_of_convergence_by_regular_matrix_methods