AIS

Chadwick, A., Pollard, J., Peterson, R., Hamilton, M., Wickstead, H., Cummings, V., Fowler, C., Muñoz, S., Roberts, J., Cruse, J., Germany, M., Holtorf, C. , "PAST. The newsletter of the Prehistoric society", PAST, vol. 44, London, University College London, Institute of Archaeology, 07/2003.
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Roberts, J. , "IDRISI for Windows: a Catalyst for New Developements", IDRISI News, vol. 7, issue 2, pp. 1-7, 1996  .
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Roberts, D. , "The ice man, lone voyager from the Copper age", National Geografic, vol. 183, n.6, pp. 36-67, 1993  .
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Healey, E., Robertson-Mackay, R., Healy, F., Webb, R.E., Martingell, H., Snape, S.R., Tyldesley, J.A., Masson Phillips, T., Catton, J. , "Lithics - The Newsletter of the Lithic Studies Society, 4", Lithics - The Newsletter of the Lithic Studies Society, vol. 4, 1983  .
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