https://www.sci.ibaraki.ac.jp/post-739/https://www.sci.ibaraki.ac.jp/post-945/https://www.sci.ibaraki.ac.jp/post-947/https://www.sci.ibaraki.ac.jp/post-949/https://www.sci.ibaraki.ac.jp/post-1445/https://www.sci.ibaraki.ac.jp/post-1574/https://www.sci.ibaraki.ac.jp/post-1711/https://www.sci.ibaraki.ac.jp/post-1717/