Ballmann, W., Gromov, M., & Schroeder, V. (1985). Manifolds of nonpositive curvature: based on 4 lectures: Paris, 02.81. Boston, MA: Birkhaeuser.
Chicago Style CitationBallmann, W., M. Gromov, andfavorite V. Schroeder. Manifolds of Nonpositive Curvature: Based On 4 Lectures: Paris, 02.81. Boston, MA: Birkhaeuser, 1985.
MLA CitationBallmann, W., M. Gromov, andfavorite V. Schroeder. Manifolds of Nonpositive Curvature: Based On 4 Lectures: Paris, 02.81. Boston, MA: Birkhaeuser, 1985.
Warning: These citations may not always be 100% accurate.