(原始内容存档于2022-05-10). SAMUEL AXON. iPad mini teardown sheds new light on “jelly scrolling” controversy. Ars Technica. 2021-10-01 [2021-12-10]. (原始内容存档于2022-02-10)
(页面存档备份,存于互联网档案馆) "It is Easy to Fly Autogiro Declares Inventor" (页面存档备份,存于互联网档案馆) Popular Mechanics, January 1930 pg.45 and see drawings by scrolling up to pg. 44