1. Back, W. 1985. Geochemical significance of aquitards. Proceedings of the International Association of Hydrogeologists, Tucson, Arizona Congress, Hydrogeology of Rocks of Low Permeability Jan 7-12, 1985. Part 1, 358–369.
2. Groundwater chemistry in the Sellafield area: a preliminary interpretation
3. Bredehoeft, J. D., Blyth, C. R., White, W.A. & Maxey, G. B. 1963. Possible mechanisms for concentration of brines in subsurface formations. AAPG Bulletin, 47, 257–269.
4. The geology and hydrogeology of Sellafield: an overview
5. Frind, E. O. 1986. Seawater intrusion in continuous coastal aquifer aquitard systems. In: Proceedings of the Third International Conference on Finite Elements in Water Resources, 2.177–2.198.