M. Al-Shekh, A., عدنان, Y. Abdullah, I., & ابتسام. (2006). Calculate the energy levels of vanadium V2+-grafted semiconductor GaAs using the theoretical orthogonal compliant model. Journal of Education and Science (JES), 18(1), 66–78. https://doi.org/10.33899/edusj.2006.162866