Richard D. Oram: A Family Business? Colonisation and Settlement in Twelfth- and Thirteenth-Century Galloway. In: The Scottish Historical. Vol. 72, 194, Part 2. Edinburgh University Press, Oktober 1993, S.111–145, hier S. 117, JSTOR:25530586 (englisch).
Richard D. Oram: A Family Business? Colonisation and Settlement in Twelfth- and Thirteenth-Century Galloway. In: The Scottish Historical. Vol. 72, 194, Part 2. Edinburgh University Press, Oktober 1993, S.111–145, hier S. 128, JSTOR:25530586 (englisch).
