Sharma, Anupama, et al. “Synthesis of New Schiff Base of 1,3-Oxazine and 1,3-Thiazine Derivatives Derived from 4-Phenyl Substituted Chalcones and Evaluation of Their Antibacterial Activity”. Asian Journal of Chemistry, vol. 33, no. 3, Feb. 2021, pp. 531-6, doi:10.14233/ajchem.2021.23050.