{"id":"000999591","type":"book","title":"The twin virtues of King Roger II of Sicily","publisher":"Aström","publisher-place":"Jonsered","pages":"146-167","container-title":"Kairos. Studies in art history and literature in honour of Professor Gunilla Åkerström-Hougen","author":[{"family":"Torp","given":"Hjalmar"}],"issued":{"raw":"1998"}}