Galsan T. Kamal, Abdul Hakim Sh. Mohammed, N. K. Hassan. Study the Spectral Properties of the Molecule [Pentacene (C22H14)] by Using Semi-empirical Quantum Programs. Tikrit J. Pure Sci. [انترنت]. 22 مايو، 2018 [وثق 18 مايو، 2024];23(3):133-44. موجود في: https://tjps.tu.edu.iq/index.php/tjps/article/view/510