@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/}
}