1.
Parvesh Sharma, Dr. Kapil Kumar, Prof. (Dr.) Himanshu A. Pandya. DETERMINATION OF BALLPOINT AND GEL PEN INKS USING UV VIS SPECTROSCOPY. J Popl Ther Clin Pharmacol [Internet]. 2019 Aug. 9 [cited 2025 Sep. 21];26(3):77-106. Available from: https://www.jptcp.com/index.php/jptcp/article/view/9131