SALIH J, Khalid; H. R, Bahaa.; EHSAN, D. J. Fractional Free-Volume dependence of Oxygen in Beta- Irradiated Polystyrene Probed by Positron life time. Journal of Kufa-Physics, [S. l.], v. 3, n. 2, 2011. Disponível em: https://journal.uokufa.edu.iq/index.php/jkp/article/view/7426. Acesso em: 18 may. 2024.