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\bibitem{Saniz_etal2021} {\textquotedblleft}\textit{First-principles study of defects at Σ3 grain boundaries in CuGaSe2}{\textquotedblright}. Saniz R, Bekaert J, Partoens B, Lamoen D, Solid State Communications , 114263 (2021).   http://doi.org/10.1016/j.ssc.2021.114263

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