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\bibitem{Kazakov_etal2011} {\textquotedblleft}\textit{Uniform patterns of Fe-vacancy ordering in the K$_{x}$(Fe,Co)$_{2-y}$Se$_{2}$ superconductors}{\textquotedblright}. Kazakov SM, Abakumov AM, Perz-Mato JM, Ovchinnikov AV, Roslova MV, Boltalin AI, Morozov IV, Antipov EV, Van Tendeloo G, Chemistry of materials \textbf{23}, 4311 (2011).   http://doi.org/10.1021/cm201203h

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