Anderson, J. (1875) “Notice of a Flint Arrow-head in the Shaft, found in a Moss at Fyvie, Aberdeenshire, with Notes in illustration of the Manufacture of Arrow-shafts with Flint Tools”, Proceedings of the Society of Antiquaries of Scotland, 11, pp. 508–513. doi: 10.9750/PSAS.011.508.513.