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\bibitem{Hardy_etal2012} {\textquotedblleft}\textit{Properties and thermal stability of solution processed ultrathin, high-\textbf{k} bismuth titanate (Bi$_{2}$Ti$_{2}$O$_{7}$) films}{\textquotedblright}. Hardy A, Van Elshocht S, De Dobbelaere C, Hadermann J, Pourtois G, De Gendt S, Afanas{\textquoteright}ev VV, Van Bael MK, Materials research bulletin \textbf{47}, 511 (2012).   http://doi.org/10.1016/j.materresbull.2012.01.001

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