R. Molari, L. Y. Endo, C. R. Appoloni, F. L. Melquiades, O. Portezan Filho, and P. S. Parreira, “Portable EDXRF and Principal Component Analysis for inorganic element determination and provenance of eye shadows”, Semin., Exact Tech. Scienc., vol. 40, no. 2, pp. 135–144, Dec. 2019.