WASET
    A. M. Gsiea and  J. P. Goss and  P. R. Briddon and  K. M. Etmimi,  Oxygen-Interstitials and Group-V Element Doping for p-Type ZnO.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2013, vol. 75(3). 370 - 378
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10922.