Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Houkawa Takashi,Cyclo Olefin Polymer (COP) as Pharmaceutical Packaging Materials,Seikei-Kakou,09154027,The Japan Society of Polymer Processing,2019-10-20,31,11,412-415,https://cir.nii.ac.jp/crid/1390004951537671168,https://doi.org/10.4325/seikeikakou.31.412