dialogues John Avlon: Featured Columns (页面存档备份,存于互联网档案馆) – John Avlon Matt Miller: The Archives (页面存档备份,存于互联网档案馆) – Matt Miller Michael Lind articles (页面存档备份,存于互联网档案馆)
Joseph, Nets: A Tool for Representing Polyhedra in Two Dimensions, Feature Columns (American Mathematical Society), [2014-05-14], (原始内容存档于2009-01-22) Demaine
[2020-05-16]. (原始内容存档于2020-04-07). FDA provides information about dual columns on Nutrition Facts label. U.S. Food and Drug Administration (FDA). 2019-12-30