Xu, Senlin; Mei, Jiaqiang Rigidity theorems of Riemannian manifold with \(\nabla^2 \text{Ric}=0\). (English) Zbl 0898.53029 J. Math. Res. Expo. 18, No. 1, 1-10 (1998). Reviewer: A.Bucki (Oklahoma City) MSC: 53C20 53C25 PDFBibTeX XMLCite \textit{S. Xu} and \textit{J. Mei}, J. Math. Res. Expo. 18, No. 1, 1--10 (1998; Zbl 0898.53029)
Xuan, Manyou On totally umbilical submanifolds in some Riemannian manifolds. (Chinese. English summary) Zbl 0784.53033 J. Math. Res. Expo. 9, No. 2, 227-230 (1989). Reviewer: C.S.Houh (Detroit) MSC: 53C40 PDFBibTeX XMLCite \textit{M. Xuan}, J. Math. Res. Expo. 9, No. 2, 227--230 (1989; Zbl 0784.53033)