“Determination of Radon Exhalation Rates from Tiles (Marble, Granite and Ceramic) Using LR115 Type II Passive Technique”. University of Thi-Qar Journal of Science, vol. 2, no. 4, Feb. 2011, pp. 139-46, https://jsci.utq.edu.iq/index.php/main/article/view/455.