↑Alex Metcalfe, The Muslims of Medieval Italy (Edinburgh University Press, 2009), p. 21: "there is an implication in [the name Sawdān] that he was originally from sub-Saharan Africa. A problematic reference to him in an unedited text ... again suggests that, like the previous commanders of the Muslim forces in Bari, they were not Arab."
Bondioli, Lorenzo M. Islamic Bari between the Aghlabids and the Two Empires // Glaire D. Anderson; Corisande Fenwick; Mariam Rosser-Owen (redaktorlar). The Aghlabids and Their Neighbors: Art and Material Culture in Ninth-Century North Africa. Brill. 2018. 470–490.