Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hua Yun Chen,Representations of efficient score for coarse data problems based on Neumann series expansion,Annals of the Institute of Statistical Mathematics,00203157,Tokyo : Institute of Statistical Mathematics,2011-06,63,3,497-509,https://cir.nii.ac.jp/crid/1521136279782667904,