CARTER, S.; FRASER, D.; DIXON, D.; HALPIN, E.; LEE, F.; MACSWEEN, A.; ROSS, A.; SMITH, A. The sands of Breckon, Yell, Shetland: archaeological survey and excavation in an area of eroding windblown sand. Proceedings of the Society of Antiquaries of Scotland, v. 126, p. 271-301, 30 nov. 1997.