“A missing figure on slab fragment no 2 from Monifieth, Angus, the a’Chill Cross, Canna, and some implications of the development of a variant form of the Virgin’s hairstyle and dress in early medieval Scotland” (2000) Proceedings of the Society of Antiquaries of Scotland, 129, pp. 597–647. doi:10.9750/PSAS.129.597.647.