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\bibitem{Tang_etal2019} {\textquotedblleft}\textit{Pr/ZrO$_{2}$ prepared by atomic trapping : an efficient catalyst for the conversion of glycerol to lactic acid with concomitant transfer hydrogenation of cyclohexene}{\textquotedblright}. Tang Z, Liu P, Cao H, Bals S, Heeres HJ, Pescarmona PP, ACS catalysis \textbf{9}, 9953 (2019).   http://doi.org/10.1021/ACSCATAL.9B02139

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