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\bibitem{Heidari_etal2013} {\textquotedblleft}\textit{Quantitative electron tomography : the effect of the three-dimensional point spread function}{\textquotedblright}. Heidari H, van den Broek W, Bals S, Ultramicroscopy \textbf{135}, 1 (2013).   http://doi.org/10.1016/j.ultramic.2013.06.005

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