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 "Wirtz, Bernd W.","Digital business models : concepts, models, and the alphabet case study",,Springer,2019,Progress in IS,,9783030130046,,https://cir.nii.ac.jp/crid/1130000796409899776