Quraishi, Shamshad Begum, and Chung Yong- Sam. 2005. “Precision and Accuracy in Elemental Determination in Environmental Samples Using Instrumental Neutron Activation Analysis”. Biological Sciences - PJSIR 48 (3):202-8. https://v2.pjsir.org/index.php/biological-sciences/article/view/1375.