Carl Gustav Jung treated the subject in his thesis "On the Psychology and Pathology of So-Called Occult Phenomena" (1902) and in an article, "Cryptomnesia" (1905), suggested the phenomenon in Friedrich Nietzsche's Thus Spoke Zarathustra.
Carl Gustav Jung behandlede emnet i sin afhandling: "On the Psychology and Pathology of So-Called Occult Phenomena" (1902), samt foreslog i en artikel, "Cryptomnesia" (1905), at fænomenet havde hændt i Friedrich Nietzsche's "Thus Spoke Zarathustra".