D. Santoro, „The Treatment of Old Age at Court. The Kings of Sicily from Roger II to Martin II (11th–15th Century)“, in Old Age before Modernity: Case Studies and Methodological Perspectives, 500 BC ‒ 1700 AD, C. A. Neumann, Hrsg. Heidelberg: Heidelberg University Publishing, 2023, S. 311–331. doi: 10.17885/heiup.1086.c14948.