Kazuhiro Okumura. A behavior of the structure tensor on real hypersurfaces in a nonflat complex space form. Scientiae Mathematicae Japonicae. 2022. 85. 1. 49-57
Kazuhiro Okumura. Real hypersurfaces in a nonflat complex space form whose certain tensor is recurrent. Journal of Geometry. 2022. 113. 3
Kazuhiro Okumura. Real hypersurfaces in a nonflat complex space form whose ⁎-Ricci tensor is D-recurrent. Differential Geometry and its Applications. 2021. 78. 101780-101780
Kazuhiro Okumura. A certain η-parallelism on real hypersurfaces in a nonflat complex space form. Mathematica Slovaca. 2021. 71. 6. 1553-1564
Kazuhiro Okumura. Behavior of ruled real hypersurfaces in a nonflat complex space form from the viewpoint of the curvature tensor. Colloquium Mathematicum. 2021. 166. 2. 239-250