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) O'SULLIVAN M. E.,Algebraic construction of sparse matrices with large girth,IEEE Trans. Inform. Theory,,,2006,52,2,718-727,https://cir.nii.ac.jp/crid/1570854175041205376,