TY - JOUR AU - V. A. Il'in TI - The Riesz equisummability of expansions in eigenfunctions and in the $n$-dimensional Fourier integral JO - Informatics and Automation PY - 1972 SP - 151 EP - 162 VL - 128 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_1972_128_a8/ LA - ru ID - TRSPY_1972_128_a8 ER -