Santoro, Daniela: The Treatment of Old Age at Court. The Kings of Sicily from Roger II to Martin II (11th–15th Century), in Neumann, Christian Alexander (Hrsg.): Old Age before Modernity: Case Studies and Methodological Perspectives, 500 BC ‒ 1700 AD, Heidelberg: Heidelberg University Publishing, 2023 (Online-Schriften des DHI Rom. Neue Reihe: Pubblicazioni online del DHI Roma. Nuova serie, Band 8), S. 311–331. https://doi.org/10.17885/heiup.1086.c14948