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 "Vălean, Cornel Ioan","More (almost) impossible integrals, sums, and series : a new collection of fiendish problems and surprising solutions",,Springer,2023,Problem books in mathematics,,9783031212611,,https://cir.nii.ac.jp/crid/1130577883827070484