Zecevic, Nada. 2003. Brotherly Love and Brotherly Service: on the Relationship between Carlo and Leonardo Tocco. In: Isabel Davis; Miriam Müller and Sarah Rees Jones, eds. Love, Marriage and Family Ties in the Middle Ages: Selected Papers presented at the International Medieval Congress, Leeds 2001. Turnhout, Belgium: Brepols N.V., pp. 143-156. ISBN 9782503522074 [Book Section]