@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042374,
 author = {Nishimura, Kiyohiko G. and Ozaki, Hiroyuki},
 month = {Nov},
 note = {application/pdf, 本文フィルはリンク先を参照のこと},
 title = {An Axiomatic Approach to ε-contamination},
 year = {2002}
}