^Three Faces of God by David L. Miller,2005,Back Matter: "... assumed that this was a Christian trinitarian influence on late Hellenistic Orphism, but it may be that the Old Neoplatonists were closer ..."
^Sexuality in Greek and Roman Culture by Marilyn B. Skinner, 2005, page 135, "[...] of life, there was no coherent religious movement properly termed 'Orphism' (Dodds 1957: 147–9; West 1983: 2–3). Even if there were, [...]"
^A. Henrichs, “‘Hieroi Logoi’ ” and ‘Hierai Bibloi’: The (Un) Written Margins of the Sacred in Ancient Greece,” Harvard Studies in Classical Philology 101 (2003): 213-216.
^Sandys, John, Pindar. The Odes of Pindar including the Principal Fragments. Cambridge, MA: Harvard University Press; London, William Heinemann Ltd, 1937.
^Ana Isabel Jiménez San Cristóbal, Rituales órficos (Madrid: Universidad Complutense de Madrid, 2006);
^Proclus, Commentary on the Republic of Plato, II, 338, 17 Kern 224.
^Backgrounds of Early Christianity by Everett Ferguson,2003,page 162,"Orphism began in the sixth century BCE"
^W. K. C. Guthrie(英语:W. K. C. Guthrie), The Greeks & Their Gods (Beacon, 1954), p. 322; Kirk(英语:Geoffrey Kirk), Raven, & Schofield, The Presocratic Philosophers (Cambridge, 1983, 2nd edition), pp. 21, 30-31, 33; Parker, "Early Orphism", pp. 485, 497