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\bibitem{Lobovikov-Katz_etal2014} {\textquotedblleft}\textit{Tangible versus intangible in e-learning on cultural heritage : from online learning to on-site study of historic sites}{\textquotedblright}. Lobovikov-Katz A, Moropoulou A, Konstanti A, Ortiz Calderon P, Van Grieken R, Worth S, Cassar JA, De Angelis R, Biscontin G, Izzo FC, Lecture notes in computer science
T2 -- 5th EuroMed International Conference, NOV 03-08, 2014, Amathus, CYPRUS \textbf{8740}, 819 (2014).   http://doi.org/10.1007/978-3-319-13695-0_84

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