"The Idea of Revenge in Lombard Society in the Eighth and Tenth Centuries: The Cases of Paul the Deacon and Liudprand of Cremona", Jon N. Sutherland, "Speculum 50 (1975) : [recenzja]

Studia Źródłoznawcze. Commentationes, Tom 22 (1977) s. 274-275
Maciej Lipka , Jon N. Sutherland (aut. dzieła rec.)