Sahraoui, Hamdi, and Mohamed Hachicha. 2016. “Determination of Trace Elements in Mine Soil Samples Using a Portable X-Ray Fluorescence Spectrometer: A Comparative Study With ICP-OES”. Engineering and Applied Science Research 43 (3):162-65. https://ph01.tci-thaijo.org/index.php/easr/article/view/42971.