Suliyanti, Maria Margaretha, Hari Nurcahyadi, Ahmad Suntoro, and Purnomo Sidi Priambodo. 2020. “Quick Detection of Uranium and Thorium Radioactive Materials in NORM Sample Using Laser Induced Plasma Spectroscopy Technique (LIPS)”. Journal of Materials Science and Applied Energy 9 (2):507-13. https://ph01.tci-thaijo.org/index.php/jmsae_ceae/article/view/213820.