Weill-Parot, Nicolas, “Astral Magic and Intellectual Changes (Twelfth-Fifteenth Centuries): “Astrological Images” and the Concept of “Addressative” Magic”, in Jan N. Bremmer and Jan R. Veenstra (eds), The Metamorphosis of Magic: From Late Antiquity to Early Modern Period (Leuven: Peeters 2002), 167-187.