@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042210,
 author = {Kubokawa, Tatsuya and Inoue, Akira},
 month = {Jul},
 note = {application/pdf, 本文フィルはリンク先を参照のこと},
 title = {Estimation of Covariance and Precision Matrices in High Dimension},
 year = {2012}
}