Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Takada Yoshikazu,Admissibility of Prediction Regions in Two-Dimensional Normal Distribution,Kumamoto journal of mathematics,0914675X,Kumamoto University,1995-03,8,,171-178,https://cir.nii.ac.jp/crid/1570291226916646528,