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 "Eskin, G. I. (Grigoriĭ Ilʹich)",Boundary value problems for elliptic pseudodifferential equations,,American Mathematical Society,1981,Translations of mathematical monographs,,0821845039,,https://cir.nii.ac.jp/crid/1130000797504836352