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\bibitem{Akkerman_etal2019} {\textquotedblleft}\textit{Fully inorganic Ruddlesden-Popper double CI-I and triple CI-Br-I lead halide perovskite nanocrystals}{\textquotedblright}. Akkerman QA, Bladt E, Petralanda U, Dang Z, Sartori E, Baranov D, Abdelhady AL, Infante I, Bals S, Manna L, Chemistry of materials \textbf{31}, 2182 (2019).   http://doi.org/10.1021/ACS.CHEMMATER.9B00489

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