@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042755,
 author = {Kubokawa, Tatsuya and M., S. Srivastava},
 month = {Jul},
 note = {application/pdf, Former Version: 1999-CF-52, 本文フィルはリンク先を参照のこと},
 title = {Estimating the Covariance Matrix : A New Approach},
 year = {2002}
}