@article{oai:meisei.repo.nii.ac.jp:00000352,
 author = {塚田, 真一 and Tsukada, Shinichi},
 issue = {3},
 journal = {教育学部研究紀要},
 month = {Mar},
 pages = {31--41},
 title = {Estimation of covariance matrix for Stein's loss on a two-step monotone incomplete sample},
 year = {2013}
}