Skovgaard-Petersen, Inge. 1989. “Barbara E. Crawford: Scandinavian Scotland. Scotland in the Early Middle Ages, 2. Studies in the Early History of Britain Series. Leicester University Press 1987. Xiii, 274 S. Ill”. Historisk Tidsskrift 15 (januar). https://tidsskrift.dk/historisktidsskrift/article/view/53205.