Mohan, S., and J. Saravanan. “Synthesis, Characterization and Antibacterial Activity of Some Schiff Bases of 2-Amino-3-(N-Tolyl Carboxamido)-4,5-Pentamethylene Thiophenes ”. Asian Journal of Chemistry, vol. 15, no. 2, Mar. 2010, pp. 625-8, https://asianpubs.org/index.php/ajchem/article/view/21681.