共 50 条
- [1] EXISTENCE OF FLAT TORI IN ANALYTIC MANIFOLDS OF NONPOSITIVE CURVATURE ANNALES SCIENTIFIQUES DE L ECOLE NORMALE SUPERIEURE, 1991, 24 (05): : 605 - 634
- [6] MANIFOLDS OF NONPOSITIVE CURVATURE AND THEIR BUILDINGS PUBLICATIONS MATHEMATIQUES, 1987, (65): : 35 - 59
- [8] LORENTZIAN MANIFOLDS WITH NONPOSITIVE CURVATURE NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1974, 21 (01): : A207 - A208