Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SHUTOH Nobumichi,Estimation of the large covariance matrix with two-step monotone missing data,"Technical Report, Statistical Research Grourp, Hiroshima University",,,2013,13巻,,,https://cir.nii.ac.jp/crid/1010000782154927105,