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Acknowledgements
Acknowledgements
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The author thanks his colleagues of the Information Management Systems Group at the Department of Information Engineering of the University of Padova, and in particular to Prof. Maristella Agosti who
leads the research group, for the many ideas and discussions on relevant topics related to information retrieval, digital
libraries, and multimedia. A special thank to Prof. Massimo Melucci, who was one of the promoters of the research activities
on MIR at the University of Padova and who shared his experience on information retrieval and hypertexts.
Many thanks to the anonymous reviewers, for their valuable suggestions to improve the content and the structure of the paper
and for contributing to additional references to relevant research work.
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