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\bibitem{Schryvers+Potapov2002} {\textquotedblleft}\textit{R-phase structure refinement using electron diffraction data}{\textquotedblright}. Schryvers D, Potapov PL, Materials transactions \textbf{43}, 774 (2002).   http://doi.org/10.2320/matertrans.43.774

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