Mahboob, S. J., M. I. Subhopoto, R. Dewani, M. K. Pervez, and F. Nazir. “A New Process for the Synthesis of Naphthalene Based Tanning Agent: Naphthalene Based Tanning Agent”. Biological Sciences - PJSIR, vol. 53, no. 4, June 2010, pp. 230-2, https://v2.pjsir.org/index.php/biological-sciences/article/view/465.