P. Mikhnev I, V. Mikhneva S, A. Salnikova N. Studies of radon activity in civil engineering and environmental objects. IJET [Internet]. 2018 Apr. 20 [cited 2025 Aug. 17];7(2.23):162-6. Available from: https://mail.sciencepubco.com/index.php/IJET/article/view/11907