@article{oai:tsukuba.repo.nii.ac.jp:00016011,
 author = {Kato, Hisao},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {143--157},
 title = {Scalence metric spaces},
 volume = {9},
 year = {1985}
}