@article{oai:tsukuba.repo.nii.ac.jp:00016007,
 author = {Ki, U-Hang and Kim, Hyang Sook and Nakagawa, Hisao},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {9--26},
 title = {A characterization of a real hypersurface of type B},
 volume = {14},
 year = {1990}
}