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\bibitem{Oueslati_etal2015} {\textquotedblleft}\textit{Physical and electrical characterization of high-performance Cu$_{2}$ZnSnSe$_{4}$ based thin film solar cells}{\textquotedblright}. Oueslati S, Brammertz G, Buffiere M, ElAnzeery H, Touayar O, Koeble C, Bekaert J, Meuris M, Poortmans J, Thin solid films : an international journal on the science and technology of thin and thick films \textbf{582}, 224 (2015).   http://doi.org/10.1016/j.tsf.2014.10.052

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