Smith, John Alexander. “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 (November 30, 1875): 431–447. Accessed April 27, 2024. https://journals.socantscot.org/index.php/psas/article/view/5686.