M. A. Ali, M. N. I. Khan, F.-U.-Z. Chowdhury, S. Akhter, and M. M. Uddin, “Structural Properties, Impedance Spectroscopy and Dielectric Spin Relaxation of Ni-Zn Ferrite Synthesized by Double Sintering Technique”, J. Sci. Res., vol. 7, no. 3, pp. 65–75, Sep. 2015.