“Using Gaussian Basis-Sets With Gaussian Nuclear Charge Distribution to Solve Dirac-Hartree-Fock Equation for 83Bi-Atom”. Al-Nahrain Journal of Science 19, no. 3 (May 24, 2018): 70–76. Accessed November 22, 2024. https://mail.anjs.edu.iq/index.php/anjs/article/view/207.