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@article{DAN_1960_134_1_a11, author = {A. I. Sirota}, title = {Centers of non-compact simple {Lie} groups}, journal = {Doklady Akademii Nauk}, pages = {44--47}, publisher = {mathdoc}, volume = {134}, number = {1}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1960_134_1_a11/} }
A. I. Sirota. Centers of non-compact simple Lie groups. Doklady Akademii Nauk, Tome 134 (1960) no. 1, pp. 44-47. http://geodesic.mathdoc.fr/item/DAN_1960_134_1_a11/