Jithendra, Ch., et al. “Synthesis, Characterization & Antimicrobial Activities of New Isoxazole Substituted Mannich and Schiff Bases of 5-Nitroisatin Analogs”. Asian Journal of Chemistry, vol. 32, no. 4, Feb. 2020, pp. 970-4, doi:10.14233/ajchem.2020.22596.