Kuyanova, Yelena, Ilona Matveyeva, and Mukhambetkali Burkitbayev. “Radon in Water of Shu River Valley”. Chemical Bulletin of Kazakh National University 65, no. 1 (March 31, 2012): 97-101. Accessed April 3, 2025. https://chemistry.kz/bulletin/index.php/kaznu/article/view/335.