Linforth, Ivan M. (1941) The Arts of Orpheus Arno Press, New York, OCLC 514515 (页面存档备份,存于互联网档案馆)
Long, Herbert S. (1948) A Study of the doctrine of metempsychosis in Greece, from Pythagoras to Plato (Long's 1942 PhD dissertation) Princeton, New Jersey, OCLC 1472399
Bonaparte, Marie (1949) The life and works of Edgar Allan Poe: a psycho-analytic interpretation Imago, London, page 273, OCLC1398764