Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kazutoshi Imanishi and Yasuto Kuwahara,Stress field in the source region after the 2007 Mw 6.6 Niigataken Chuetsu-oki earthquake deduced from aftershock focal mechanisms: implication for a pre-mainshock stress field,"EPS : Earth, Planets and Space",13438832,Tokyo : Terra Scientific Pub. Co,2009,61,9,1053-1065,https://cir.nii.ac.jp/crid/1522825130097063936,