%0 Journal Article %A Gopal Prasad %A M.S. Raghunathan %T On the Kneser-Tits problem. %J Commentarii mathematici Helvetici %D 1985 %P 107-121 %V 60 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1985__60_140002/ %F CMH_1985__60_140002