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\bibitem{Monico_etal2015} {\textquotedblleft}\textit{Evidence for degradation of the chrome yellows in Van Gogh{\textquoteright}s sunflowers : a study using noninvasive in situ methods and synchrotron-radiation-based x-ray techniques}{\textquotedblright}. Monico L, Janssens K, Hendriks E, Vanmeert F, van der Snickt G, Cotte M, Falkenberg G, Brunetti BG, Miliani C, Angewandte Chemie: international edition in English \textbf{54}, 13923 (2015).   http://doi.org/10.1002/ANIE.201505840

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