Curvature and Topology of Riemannian ManifoldsKatsuhiro Shiohama, Takashi Sakai, Toshikazu Sunada · First published 1986 · Latest edition 2006Open the Tome
The geometry of total curvature on complete open surfacesKatsuhiro Shiohama, Takashi Shioya, Minoru Tanaka · First published 2003Open the Tome