Gow, J. M. (1888) “Notes near St Fillans : Cup-Marked Stones, Old Burying Grounds at Kindrochet and Drumnakill, Curing Stone or Charm, and Notice of a Flint Knife found on the Farm of North Pet, Tarland, Aberdeenshire”, Proceedings of the Society of Antiquaries of Scotland, 22, pp. 23–26. doi: 10.9750/PSAS.022.23.26.