dos Santos RS, de Oliveira DF, de Assis JT, dos Anjos MJ. Portable grazing exit X-ray fluorescence system using a low-power X-ray tube. Braz. J. Rad. Sci. [Internet]. 2019 Feb. 25 [cited 2024 Dec. 26];7(2A (Suppl.). Available from: https://bjrs.org.br/revista_33014/index.php/REVISTA/article/view/714