M. Shafiq1, I. Ullah Khan1, M. Nadeem Arshad1, and W. Ahmad Siddiqui2, “Synthesis and Antifungal Activity of Halogen-Substituted 2,1-Benzothiazine-2,2-dioxide Derivatives”, ajc, vol. 23, no. 5, pp. 2101–2105, Jan. 2011.