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\bibitem{Tyutyunnik_etal2013} {\textquotedblleft}\textit{K$_{2}$CaV$_{2}$O$_{7}$ : a pyrovanadate with a new layered type of structure in the A$_{2}$BV$_{2}$O$_{7}$ family}{\textquotedblright}. Tyutyunnik AP, Slobodin BV, Samigullina RF, Verberck B, Tarakina NV, Journal of the Chemical Society : Dalton transactions \textbf{42}, 1057 (2013).   http://doi.org/10.1039/c2dt31246h

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