Abbott, P., Davies, S., Austin, W. E., Pearce, N. J., & Hibbert, F. D. (2011). Identification of cryptotephra horizons in a North East Atlantic marine record spanning marine isotope stages 4 and 5a (∼60,000–82,000 a b2k). Quaternary International, 246(1-2), pp. 177-189. doi:10.1016/j.quaint.2011.07.033

Abbott, Peter, Siwan Davies, William E.N Austin, Nicholas J.G Pearce, and Fiona D. Hibbert. "Identification of Cryptotephra Horizons in a North East Atlantic Marine Record Spanning Marine Isotope Stages 4 and 5a (∼60,000–82,000 a B2k)." Quaternary International 246, no. 1-2 (2011): 177-189.

Abbott, Peter, et al. "Identification of Cryptotephra Horizons in a North East Atlantic Marine Record Spanning Marine Isotope Stages 4 and 5a (∼60,000–82,000 a B2k)." Quaternary International 246.1-2 (2011): 177-189.