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\bibitem{Potgieter-Vermaak_etal2006} {\textquotedblleft}\textit{The application of Raman spectrometry to investigate and characterize cement: part I: a review}{\textquotedblright}. Potgieter-Vermaak SS, Potgieter JH, Van Grieken R, Cement and concrete research \textbf{36}, 656 (2006).   http://doi.org/10.1016/J.CEMCONRES.2005.09.008

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