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@article{DAN_1971_196_3_a11, author = {P. E. Sobolevskii}, title = {Semigroups of growth~$\alpha$}, journal = {Doklady Akademii Nauk}, pages = {535--537}, publisher = {mathdoc}, volume = {196}, number = {3}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_196_3_a11/} }
P. E. Sobolevskii. Semigroups of growth~$\alpha$. Doklady Akademii Nauk, Tome 196 (1971) no. 3, pp. 535-537. http://geodesic.mathdoc.fr/item/DAN_1971_196_3_a11/