Anderson, Marjorie O. (1973): , Edinburgh. Grant, Alexander (2000): «The Province of Ross and the Kingdom of Alba» i: Cowan, E.J. & McDonald, R. Andrew, red.: , Edinburgh. Jackson, Kenneth, red. (1970): , The Osborn Bergin * Memorial Lecture, Cambridge 1972) Hudson, Benjamin T. (1994): , Westport. Roberts, John L. (1997): , Edinburgh. Woolf, Alex (2006): «Dun Nechtain, Fortriu and the Geography of the Picts» i: , s. 182–201.