@article{oai:tsukuba.repo.nii.ac.jp:00015892,
 author = {Oka, Masatoshi},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {1--8},
 title = {Expansiveness of real flows},
 volume = {14},
 year = {1990}
}