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\bibitem{Cagno_etal2014} {\textquotedblleft}\textit{Deeply colored and black-appearing Roman glass : a continued research}{\textquotedblright}. Cagno S, Cosyns P, Izmer A, Vanhaecke F, Nys K, Janssens K, Journal of archaeological science \textbf{42}, 128 (2014).   http://doi.org/10.1016/J.JAS.2013.11.003

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