Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yasuhiro Koike and Atsushi Kondo and Yasushi Yamaki,Dopant designing for thermally stable graded index plastic optical fiber,SPIE Proceedings,0277-786X,SPIE,2009-02-12,7213,,72130X,https://cir.nii.ac.jp/crid/1870020692627607552,https://doi.org/10.1117/12.808092