On equiconvergence of Riesz means of eigenfunction expansion
On the Convergence of Some Eigenfunction Expansions
On the Riesz Means of Expansions by Riesz Bases Formed by Eigenfunctions for the Ordinary Differential Operator of 4-th Order
On the approximations of the bounded measurable functions by Hermite-Fejer interpolation polynomials in Lp Space