Paul T. Keyser, " Greco-Roman Alchemy and Coins of Imitation Silver ", American Journal of Numismatics 7–8 (1995–1996), p. 209–234.
pˈɔːl tˈiː. kˈiːsɚ, " ɡɹˈiːkoʊɹˈoʊmən ˈælkəmi ænd kˈɔɪnz ʌv ˌɪmɪtˈeɪʃən sˈɪlvɚ ", ɐmˈɛɹɪkən dʒˈɜːnəl ʌv nˌuːmɪsmˈæɾɪks sˈɛvən ˈeɪt nˈaɪntiːnhˈʌndɹɪd nˈaɪnti fˈaɪv nˈaɪntiːnhˈʌndɹɪd nˈaɪnti sˈɪks, pˈiː. tˈuːhˈʌndɹɪd nˈaɪn tˈuːhˈʌndɹɪd θˈɜːɾi fˈoːɹ.