Golomb's inductive proof of a tromino theorem at cut-the-knot. [2006-01-21]. (原始内容存档于2006-09-28). Tromino Puzzle(页面存档备份,存于互联网档案馆) at cut-the-knot Interactive
(原始内容存档于2022-03-08) (中文(臺灣)). BLEACH WE DO knot ALWAYS LOVE YOU. 集英社. [2022-03-08]. (原始内容存档于2022-03-08) (日语). BLEACH死神 WE DO knot ALWAYS LOVE YOU. 東立出版社. [2022-03-08]