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 "Bahri, A.",Critical points at infinity in some variational problems,,Longman Scientific & Technical,1989,Pitman research notes in mathematics series,,"0582021642,0470211474",,https://cir.nii.ac.jp/crid/1130282273208035968