Lomax 2013, p. 440. Lomax, John (18 October 2013). "Manfred". In Richard K. Emmerson (ed.). Key Figures in Medieval Europe: An Encyclopedia. Routledge. pp. 440–. ISBN978-1-136-77519-2.
Berg 1993, p. 113. Berg, Beverly (1993). "Manfred of Sicily and Urban IV: negotiations of 1262". Mediaeval Studies. 55: 111–136. doi:10.1484/J.MS.2.306406.
Lake, Crystal B. (May 2013). "Bloody Records: Manuscripts and Politics in The Castle of Otranto". Modern Philology. 110 (4). University of Chicago Press: 489–512. doi:10.1086/670066. JSTOR10.1086/670066. S2CID153695496.
Lake, Crystal B. (May 2013). "Bloody Records: Manuscripts and Politics in The Castle of Otranto". Modern Philology. 110 (4). University of Chicago Press: 489–512. doi:10.1086/670066. JSTOR10.1086/670066. S2CID153695496.
Lake, Crystal B. (May 2013). "Bloody Records: Manuscripts and Politics in The Castle of Otranto". Modern Philology. 110 (4). University of Chicago Press: 489–512. doi:10.1086/670066. JSTOR10.1086/670066. S2CID153695496.