N. Sattarahmady, H. Heli, A. R. Mehdizadeh, H. Yarmohammadi, and S. M. J. Mortazavi, “Evaluation of Serum Catalase Activity and Malondialdehyde Level as Stress Oxidative Biomarkers among Iranian Welders”, Galen Med J, vol. 4, no. 3, p. e326, Jun. 2015.