Peacock, A. T., Coad, J. P., Lama, F., Behrisch, R., Martinelli, A. P., Mills, B. E., et al. (1990). Impurity Coverage and Deuterium Inventory of Beryllium and Carbon First Wall Components After Beryllium Operation in JET. Journal of Nuclear Materials, 176-177, 326-331. doi:10.1016/0022-3115(90)90067-W.