@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042472,
 author = {Hirukawa, Masayuki},
 month = {Jun},
 note = {application/pdf, 本文フィルはリンク先を参照のこと},
 title = {A Two-Stage Plug-In Bandwidth Selection and Its Implementation for Covariance Estimation},
 year = {2006}
}