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\bibitem{Bekaert_etal2014} {\textquotedblleft}\textit{Native point defects in CuIn$_{1-x}$Ga$_{x}$Se$_{2}$ : hybrid density functional calculations predict the origin of p- and n-type conductivity}{\textquotedblright}. Bekaert J, Saniz R, Partoens B, Lamoen D, Physical chemistry, chemical physics \textbf{16}, 22299 (2014).   http://doi.org/10.1039/c4cp02870h

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