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
"Gazzola, Filippo and Grunau, Hans-Christoph and Sweers, Guido",Polyharmonic boundary value problems : positivity preserving and nonlinear higher order elliptic equations in bounded domains,,Springer,2010,Lecture notes in mathematics,,9783642122446,,https://cir.nii.ac.jp/crid/1130000795595944448