Chandler, Cullen J. (2002). "Between Court and Counts: Carolingian Catalonia and the aprisio grant, 778-987". Early Medieval Europe. 11: 19–44. doi:10.1111/1468-0254.00099. S2CID154531960.
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Chandler, Cullen J. (2002). "Between Court and Counts: Carolingian Catalonia and the aprisio grant, 778-987". Early Medieval Europe. 11: 19–44. doi:10.1111/1468-0254.00099. S2CID154531960.