Smith, J.A. 1875. Notice of a Small Bronze Blade found in a Sepulchral Tumulus or Cairn at Rogart, Sutherland, and of similar Bronze Implements found in Different parts of Scotland. Proceedings of the Society of Antiquaries of Scotland. 10, (Nov. 1875), 431–447. DOI:https://doi.org/10.9750/PSAS.010.431.447.