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
"Chajda, Ivan and Länger, Helmut",Directoids : an algebraic approach to ordered sets,,Heldermann,2011,Research and exposition in mathematics,,9783885382324,,https://cir.nii.ac.jp/crid/1130282269224683264