R. R. GUPTA, M.K. PURBA, S. GUPTA,. 2021. “Effectiveness and Potential of SEM-EDX for Analysis & Differentiation of Overlapped Black Pen Inks”. Annals of the Romanian Society for Cell Biology 25 (6):7332-38. https://www.annalsofrscb.ro/index.php/journal/article/view/6883.