@article{FAA_1978_12_4_a2,
     author = {A. G. Kostyuchenko and A. A. Shkalikov},
     title = {Summability of eigenfunction expansions of differential operators and convolution operators},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {24--40},
     publisher = {mathdoc},
     volume = {12},
     number = {4},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1978_12_4_a2/}
}