WASET
    Abdusalam Gsiea and  Ramadan Al-habashi and  Mohamed Atumi and  Khaled Atmimi,  First-Principles Density Functional Study of Nitrogen-Doped P-Type ZnO.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 111(3). 156 - 159
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/10006416.