RITCHIE, A.; BRAMWELL, D.; COLLINS, G. H.; DICKSON, C.; EVANS, J. G.; HENSHALL, A. S.; INSKEEP, R.; KENWARD, H.; NODDLE, B. A.; VAUGHAN, M.; WHEELER, A.; WHITTINGTON, G.; WILLIAMS, D. F. Excavation of a Neolithic farmstead at Knap of Howar, Papa Westray, Orkney. Proceedings of the Society of Antiquaries of Scotland, v. 113, p. 40-121, 30 nov. 1984.