Mackenzie, J.B. 1909. Notes on a Stone Circle at Greenland, Parish of Kenmore, and a Grave-slab in the Burying-ground of the Macnabs at Killin. Proceedings of the Society of Antiquaries of Scotland. 43, (Nov. 1909), 271–277. DOI:https://doi.org/10.9750/PSAS.043.271.277.