@article{oai:tsukuba.repo.nii.ac.jp:00016132,
 author = {Colet, Enric Fossas i},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {457--475},
 title = {Killing vector fields on semiriemannian manifolds},
 volume = {13},
 year = {1989}
}