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
"Kristály, Alexandru and Rădulescu, Vicenţiu and Varga, Csaba Gyorgy","Variational principles in mathematical physics, geometry, and economics : qualitative analysis of nonlinear equations and unilateral problems",,Cambridge University Press,2010,Encyclopedia of mathematics and its applications,,9780521117821,,https://cir.nii.ac.jp/crid/1130000795279605248