Rukimbira, P. (1995). Vertical sectional curvature and K-contactness
.
JOURNAL OF GEOMETRY, 53(1-2), 163-166. 10.1007/BF01224048
Rukimbira, P. (1995). Vertical sectional curvature and K-contactness
. JOURNAL OF GEOMETRY, 53(1-2), 163-166. 10.1007/BF01224048