Yuki Mori (2008)
The dragon and the serpent in Arthur's dream in Malory's "Le Morte D'Arthur"
Studies in Medieval English Language and Literature(23):55-66.
The article surveys the symbolism of the dragon and the serpent in Arthur’s prophetic dreams in Malory, suggesting that these two animals are the symbols of Mordred, the issue of Arthur’s incestuous adultery with Margawse. Also discusses how Mordred functions not only as Arthur’s enemy but also as the symbol of his sin.