@article{oai:tsukuba.repo.nii.ac.jp:00016105,
 author = {Ikawa, Toshihiko},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {353--371},
 title = {On curves and submanifolds in an indefinite-Riemannian manifold},
 volume = {9},
 year = {1985}
}