Callander, J. 1916. Notice of (1) Three Stone Cups found in a Cairn in Aberdeenshire, and (2) a Short Cist containing a Beaker Urn found at Boglehill Wood, Longniddry, East Lothian. Proceedings of the Society of Antiquaries of Scotland. 50, (Nov. 1916), 145–151. DOI:https://doi.org/10.9750/PSAS.050.145.151.