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\bibitem{VandenBroek_etal2023} {\textquotedblleft}\textit{Convexity constraints on linear background models for electron energy-loss spectra}{\textquotedblright}. Van den Broek W, Jannis D, Verbeeck J, Ultramicroscopy \textbf{254}, 113830 (2023).   http://doi.org/10.1016/j.ultramic.2023.113830

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