Hasan Sallomi, Adheed. “Safety Distance and Power Density Calculations for GSM Communication Systems”. Journal of Engineering and Sustainable Development 15, no. 2 (June 1, 2011): 63–73. Accessed June 4, 2026. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1387.