Plöger, Karsten. 2005. England and the Avignon Popes: The Practice of Diplomacy in Late Medieval Europe (Legenda)
Gibbons, David. 2002. Metaphor in Dante (Legenda)
Plöger, Karsten. 2005. England and the Avignon Popes: The Practice of Diplomacy in Late Medieval Europe (Legenda)
Gibbons, David. 2002. Metaphor in Dante (Legenda)