1. Synnott, C. A survey of published reasons for burying butter in bogs. Ulster J. Archaeol. 69, 141–149 (2010).
2. Synnott, C. Bog butter – What is it, where was it found, and when and why was it put there? in Butter in Ireland from the earliest times to the 21st century (eds Foynes, P. Rynne, C. & Synnott, C.) 171–194 (Cork Butter Museum, 2014).
3. Earwood, C. Bog Butter: A Two Thousand Year History. J. Irish Archaeol. 8, 25–42 (1997).
4. Cronin, T. et al. Composition of ancient Irish bog butter. Int. Dairy J. 17, 1011–1020 (2007).
5. Evans, E. E. Bog butter: another explanation. Ulster J. Archaeol. 10, 59–62 (1947).