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Catenazzi, N.; Sommaruga, L.: ¬An electronic library based on hyper-books : the Hyper-Lib project (1995)
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Catenazzi, N.; Sommaruga, L.: Hyper-book : a formal model for electronic books (1994)
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Catenazzi, N.; Sommaruga, L.: Hyper-lib : a formal model for an electronic library based on hyper-books (1995)
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