著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Hejhal, Dennis A",Eigenvalues of the Laplacian for Hecke triangle groups,,American Mathematical Society,1992,Memoirs of the American Mathematical Society,,0821825291,,https://cir.nii.ac.jp/crid/1130282270045021184