Geodesic
The problem of strong approximation and the Kneser--Tits conjecture for algebraic groups
Izvestiya. Mathematics , Tome 3 (1969) no. 6, pp. 1139-1147.

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We conclude an investigation of the problem of strong approximation in algebraic groups. A basic role is played by the proof of the Kneser–Tits conjecture concerning simple, simply connected groups over locally compact fields. 
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     title = {The problem of strong approximation and the {Kneser--Tits} conjecture for algebraic groups},
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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/

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