E. A. A. . Alahsab, A. A. A. . Ahmed, and A. M. . Abdulwahab, “Synthesis, Structural, Optical and Electrical Properties of Pure and Doped NiO Nanostructures Prepared via The Co-precipitation Method”, TU. J. Nat. Appl. Sci. , vol. 8, no. 1, pp. 56 – 69, Jun. 2023.