ALCOCK, L.; ALCOCK, E. Reconnaissance excavations on early historic fortifications and other royal sites in Scotland, 1974-84; 5: A, excavations & other fieldwork at Forteviot, Perthshire, 1981; B, excavations at Urquhart Castle, Inverness-shire, 1983; C, excavations at Dunnottar, Kincardineshire, 1984. Proceedings of the Society of Antiquaries of Scotland, v. 122, p. 215-287, 30 nov. 1993.