URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::862f703fee7623eee427be65e39138c3http://id.nii.ac.jp/1438/00009307/
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::858032b66fd82ab8636e16dcd9354d92https://niigata-u.repo.nii.ac.jp/records/1705
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e67615edee64affa6f0f300a5ded209https://niigata-u.repo.nii.ac.jp/records/1707