著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Yosuke Niwa and Yosuke Fujii,A conjugate BFGS method for accurate estimation of a posterior error covariance matrix in a linear inverse problem,Quarterly Journal of the Royal Meteorological Society,0035-9009,Wiley,2020-08-09,146,732,3118-3143,https://cir.nii.ac.jp/crid/1360849939790863232,https://doi.org/10.1002/qj.3838