M.A. AL-Rawi, Jasim, and Khalid F. AL-Shahiry. “Synthesis of 4-Oxo-2-Thioxo-3,4-Dihydro-2H, 1,3-Substituted Benzoxazine, Their Transformation With Water, Diazomethane and Amines ”. Asian Journal of Chemistry 2, no. 4 (March 30, 2010): 343–350. Accessed July 4, 2024. https://asianpubs.org/index.php/ajchem/article/view/25331.