S. K. R. V and V. V. S. Peruri, “Synthesis of Substituted 1,4-Benzoxazine Derivatives through Diels-Alder Reaction: DOI: https://doi.org/10.55434/CBI.2019.7111”, Carib. J. Sci. Tech., vol. 7, no. 1, pp. 88–95, Dec. 2019.