L. Alcock and E. A. Alcock, “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”, PSAS, vol. 122, pp. 215–287, Nov. 1993.