著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Vipin Kumar and Sachin Kr. Sharma and T.P Sharma and V Singh,Band gap determination in thick films from reflectance measurements,Optical Materials,0925-3467,Elsevier BV,1999-05,12,1,115-119,https://cir.nii.ac.jp/crid/1361699995199394304,https://doi.org/10.1016/s0925-3467(98)00052-4