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\bibitem{daPieve_etal2013} {\textquotedblleft}\textit{Origin of magnetism and quasiparticles properties in Cr-doped TiO$_{2}$}{\textquotedblright}. da Pieve F, Di Matteo S, Rangel T, Giantomassi M, Lamoen D, Rignanese G-M, Gonze X, Physical review letters \textbf{110}, 136402 (2013).   http://doi.org/10.1103/PhysRevLett.110.136402

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