P. O. Osarumwense, “Synthesis and antibacterial activity of newly synthesized 7-chloro–2–methyl-4h–benzo[d] [1, 3]–oxazin–4–one and 3–amino-7-chloro-2–methyl-quinazolin-4(3h)–one”, GSC Biol. Pharm. Sci., vol. 11, no. 1, pp. 212–220, Apr. 2020.