1. Old Testament, Book of Zechariah, 13, 9.
2. Old Testament, Book of Ezekiel 22, 18–22; Book of Isaiah 1, 25.
3. Geographi Graeci Minores, Paris, 1855. Vol. 1, p. 125.
4. Plinius, Mat. Hist. Libri XXXIII. 24.
5. M.Berthelot, Collection des anciens alchimistes grecs, Paris, 1887, p. 36.