%0 Journal Article %A Keith Burns %A Ralf Spatzier %T Manifolds of nonpositive curvature and their buildings %J Publications Mathématiques de l'IHÉS %D 1987 %P 35-59 %V 65 %I Institut des Hautes Études Scientifiques %U https://pmihes.centre-mersenne.org/articles/10.1007/BF02698934/ %R 10.1007/BF02698934 %G en %F PMIHES_1987__65__35_0