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Casadio, F.; Xie, S.; Rukes, S. C.; Myers, B.; Gray, K. A.; Warta, R.; Fiedler, I. (2011). "Electron energy loss spectroscopy elucidates the elusive darkening of zinc potassium chromate in Georges Seurat's A Sunday on La Grande Jatte–1884". Analytical and Bioanalytical Chemistry. 399 (9): 2909–20. doi:10.1007/s00216-010-4264-9. PMID20953774. S2CID26844464.
Casadio, F.; Xie, S.; Rukes, S. C.; Myers, B.; Gray, K. A.; Warta, R.; Fiedler, I. (2011). "Electron energy loss spectroscopy elucidates the elusive darkening of zinc potassium chromate in Georges Seurat's A Sunday on La Grande Jatte–1884". Analytical and Bioanalytical Chemistry. 399 (9): 2909–20. doi:10.1007/s00216-010-4264-9. PMID20953774. S2CID26844464.