Smith, John Alexander. “Notice of Three Small Bronze Blades, or Instruments Believed to Be Razors, and a Bronze Socketed Celt in the Museum of the Society, With Remarks on Other Small Bronze Blades”. Proceedings of the Society of Antiquaries of Scotland, vol. 6, Nov. 1865, pp. 357-71, doi:10.9750/PSAS.006.357.371.