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Lennon, M.J.: ¬The controversy over the Compton's multimedia patent (1994)
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Carlton, T.: I want an electronic bookstore! (1993)
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Pack, T.: Digital circles of knowledge (1995)
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Kim, J.-H.; Choi, K.-S.: Patent document categorization based on semantic structural information (2007)
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Jascó, P.: State-of-the-art multimedia in 1996 : the 'big four' general encyclopedias on CD-ROM (1996)
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