S. Paudel, P. R. Adhikari, O. P. Upadhyay, G. C. Kaphle, and A. Srivastava, “First Principles Study of Electronic and Optical Properties of Pristine and X (Cu, Ag And Au) Doped BiOBr”, J. Inst. Sci. Tech., vol. 22, no. 2, pp. 63–69, Apr. 2018.