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@article{IM2_1969_3_6_a0, author = {V. P. Platonov}, title = {The problem of strong approximation and the {Kneser--Tits} conjecture for algebraic groups}, journal = {Izvestiya. Mathematics }, pages = {1139--1147}, publisher = {mathdoc}, volume = {3}, number = {6}, year = {1969}, language = {en}, url = {http://geodesic.mathdoc.fr/item/IM2_1969_3_6_a0/} }
V. P. Platonov. The problem of strong approximation and the Kneser--Tits conjecture for algebraic groups. Izvestiya. Mathematics , Tome 3 (1969) no. 6, pp. 1139-1147. http://geodesic.mathdoc.fr/item/IM2_1969_3_6_a0/