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D-Lib Magazine (September 2007)
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The Semantic Web: Research and Applications (2007), pp. 533-548.
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D-Lib Magazine, Vol. 12, No. 5. (May 2006)
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CoRR, Vol. cs.DL/0401029 (2004)
Program: electronic library and information systems, Vol. 40, No. 4. (2006), pp. 361-371.
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Ariadne, No. 49. (October 2006)
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