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) Paula Tretkoff,K3 surfaces with algebraic period ratios have complex multiplication,International Journal of Number Theory,1793-0421,World Scientific Pub Co Pte Ltd,2015-08,11,05,1709-1724,https://cir.nii.ac.jp/crid/1362262945453420800,https://doi.org/10.1142/s1793042115400217