@article{oai:tsukuba.repo.nii.ac.jp:00016135,
 author = {Colet, Enric Fossas i},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {477--482},
 title = {Killing vector fields and the holonomy algebra in semiriemannian manifolds},
 volume = {13},
 year = {1989}
}