1 |
B. J. Papantoniou, Contact Riemannian manifolds satifying R( ,X) R = 0 and (k, )-nullity distribution, Yokohama Math. J. 40 (1993), no. 2, 149-161.
|
2 |
Z. I. Szabo, Structure theorems on Riemannian spaces satisfying R(X, Y ) R = 0. I. The local version, J. Differential Geom. 17 (1982), no. 4, 531-582.
|
3 |
T. Takahashi, Sasakian -symmetric spaces, Tohoku Math. J. (2) 29 (1977), no. 1, 91-113.
DOI
|
4 |
S. Tanno, Ricci Curvatures of contact Riemannian manifolds, Tohoku Math. J. (2) 40 (1988), no. 3, 441-448.
DOI
|
5 |
J. Vilms, Submanifolds of Euclidean space with parallel second fundamental form, Proc. Amer. Math. Soc. 32 (1972), 263-267.
|
6 |
K. Yano and S. Bochner, Curvature and Betti numbers, Annals of Mathematics Studies 32, Princeton University Press, 1953.
|
7 |
D. E. Blair, T. Koufogiorgos, and B. J. Papantoniou, Contact metric manifolds satisfying a nullity condition, Israel J. Math. 91 (1995), no. 1-3, 189-214.
DOI
|
8 |
E. Boeckx, A full classification of contact metric (k; )-spaces, Illinois J. Math. 44 (2000), no. 1, 212-219.
|
9 |
U. C. De, A. A. Shaikh, and S. Biswas, On -recurrent Sasakian manifolds, Novi Sad J. Math. 33 (2003), no. 2, 43-48.
|
10 |
E. Boeckx, P. Buecken, and L. Vanhecke, -symmetric contact metric spaces, Glasg. Math. J. 41 (1999), no. 3, 409-416.
DOI
|
11 |
O. Kowalski, An explicit classification of 3-dimensional Riemannian spaces satisfying R(X, Y ) R = 0, Czechoslovak Math. J. 46(121) (1996), no. 3, 427-474.
|