Jaber Dosh, Rukia, and Qassim Shamkhi AL-Khafaji,. “Study of Energy and Some Atomic Properties for Electronic Shells at Ground State of Three Electron Systems by Analysis Hartree-Fock-Roothaan Wavefunction”. Journal of Kufa-Physics, vol. 5, no. 1, June 2013, https://journal.uokufa.edu.iq/index.php/jkp/article/view/7459.