Abdul Rahman Rashid Hammood, Abdul Hakim shakkoor Mohammed, and Nadim Khalid Hassan, “STUDYING AND CALCULATION OF THE POTENTIAL ENERGY FOR TWO OF MOLECULES [TRIMETHYL GALLIUM AND TRIETHYL GALLIUM,] BY SEMI EMPIRICAL PROGRAMS”, Tikrit J. Pure Sci., vol. 22, no. 3, pp. 146–155, Jan. 2023.