^Several of these references are cited in the introduction to the book Speculations on the Fourth Dimension, edited by Rudolf Rucker.
^`My Right To Die´, Woman Kills Self in The Washington Times v. 1908-05-28 (PDF (頁面存檔備份,存於互聯網檔案館)); Mrs. Mary Hinton A Suicide in The New York Times v. 1908-05-29 (PDF (頁面存檔備份,存於互聯網檔案館)).
^White, Christopher G., 2018. Other Worlds: Spirituality and the Search for Invisible Dimensions. Harvard University Press.