S, Chauhan Jayprakash, and Pandya Ajit V. 2013. “SYNTHESIS, CHARACTERIZATION AND SPECTROPHOTOMETRIC DETERMINATION OF NI (II) ION BY PYRIDINE 2, 3 DICARBOXYLIC ACID ”. International Research Journal of Pharmaceutical and Applied Sciences 3 (5), 31-36. https://scienztech.org/index.php/irjpas/article/view/486.