1. Andersen, S. A. (1937). De vulkanske Askelag i Vejgennemskrringen ved Øls og deres Udbredelse i Danmark. Danmarks Geologiske Undersøgelse, Rrkke 2, 59, 50.
2. Bell, B. R., and Emelius, C. H. (1988). Pyroclastic rocks of the British Tertiary Volcanic Province. In A. C. Morton, and L. M. Parson , Early Tertiary Volcanism and the Opening of the NE Atlantic, Vol. 39 (pp. 365–379). London: Geological Society Special Publication.
3. Bergh, S. G., and Sigvaldason, G. E. (1991). Pleistocene mass-flow deposits of basaltic hyaloclastite on a shallow submarine shelf, South Iceland. Bulletin of Volcanology, 53, 597–611.
4. Bott, H. M. P. (1988). A new look at the causes and consequences of the Icelandic hot-spot. In A. C. Morton, and L. M. Parson , Early Tertiary Volcanism and the Opening of the NE Atlantic, Vol. 39 (pp. 15–23). London: Geological Society Special Publication.
5. Bøggild, O. B. (1918). Den vulkanske Aske i Moleret. Danmarks Geologiske Undersøgelse. Rrkke 2, 33, 139.