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Research partially supported by NSF Grant MCS-8004026.
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Zimmer, R.J. Ergodic theory, semisimple lie groups, and foliations by manifolds of negative curvature. Publications Mathématiques de L’Institut des Hautes Scientifiques 55, 37–62 (1982). https://doi.org/10.1007/BF02698694
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DOI: https://doi.org/10.1007/BF02698694