S. Mukherjee, S. Kumar, S. Saha, S. Basu, S. Chatterjee, and A. Ghosh, “Tailoring of Optical and Electrical Properties of Transition Metal Ions-Doped ZnO-Based Diluted Magnetic Semiconductor Nanoparticles”, ajc, vol. 23, no. 12, pp. 5553–5556, Sep. 2011.