Kalef-Ezra, J., and S. Valakis. “Limitations in the Assessment of Radon Dose: The Role of Activity Measurements in the Human Body”. HNPS Advances in Nuclear Physics 24 (April 1, 2019): 92–96. Accessed May 3, 2024. https://eproceedings.epublishing.ekt.gr/index.php/hnps/article/view/1849.