Ivanov, Dmitry, and Marina Efremova. “Estimation of Total Beta-Activity in the Fungi Fruit Bodies of <em>Leccinum</em&gt; Genus Growing in Wood and Bog Ecosystems of the Leningrad Region”. Biological Communications0, no. 2 (May 25, 2012): 55–61. Accessed October 27, 2020. https://biocomm.spbu.ru/article/view/3847.