Henderson, I. and Small, A. 1964. Two Pictish Symbol Stones: (i) Flemington Farm, Aberlemmo, Angus; (ii) Fairygreen, Collace, Perthshire. Proceedings of the Society of Antiquaries of Scotland. 95, (Nov. 1964), 219–222. DOI:https://doi.org/10.9750/PSAS.095.219.222.