I. V. Ukrainets, L. A. Petrushova, O. V. Gorokhova, and L. V. Sidorenko, “The synthesis and biological properties of hydroxy-(alkoxy)substituted anilides of 4-hydroxy-2,2-dioxo-1h-2λ6,1-benzothiazine-3-carboxylic acids”, J. Org. Pharm. Chem., vol. 14, no. 1(53), pp. 67–73, Mar. 2016.