共 13 条
[1]
[Anonymous], 2008, Hokkaido Math. J.
[2]
[Anonymous], 1978, J DIFFER GEOM
[3]
[Anonymous], 2002, RIEMANNIAN GEOMETRY
[4]
Cecil TE, 2015, SPRINGER MONOGR MATH, P343, DOI 10.1007/978-1-4939-3246-7_6
[5]
Cho JT, 1999, PUBL MATH-DEBRECEN, V54, P473
[10]
TAKAGI R, 1975, J MATH SOC JPN, V27, P507, DOI 10.2969/jmsj/02740507