Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Komiyama Ryoichi,Geopolitical risk in energy market (2),Journal of the Atomic Energy Society of Japan,18822606,Atomic Energy Society of Japan,2017,59,9,515-519,https://cir.nii.ac.jp/crid/1390283659852827904,https://doi.org/10.3327/jaesjb.59.9_515