共 8 条
[1]
[Anonymous], GEOMETRY TOPOLOGY SU
[2]
BERNDT J, 1989, J REINE ANGEW MATH, V395, P132
[3]
Berndt J., 1990, Geometry and Topology of Submanifolds II, Avignon, P10
[8]
TAKAGI R, 1975, J MATH SOC JPN, V27, P507, DOI 10.2969/jmsj/02740507