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@article{DAN_1984_276_1_a11, author = {S. S. Shterengas}, title = {Riesz summation and the operator cosine-function}, journal = {Doklady Akademii Nauk}, pages = {51--54}, publisher = {mathdoc}, volume = {276}, number = {1}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1984_276_1_a11/} }
S. S. Shterengas. Riesz summation and the operator cosine-function. Doklady Akademii Nauk, Tome 276 (1984) no. 1, pp. 51-54. http://geodesic.mathdoc.fr/item/DAN_1984_276_1_a11/