LUPULESCU, A., DICU, T., PAPP, B. ., & CUCOŞ, A. (2018). DETERMINATION OF THE MONTHLY VARIATION OF RADON ACTIVITY CONCENTRATION IN SOIL. Studia Universitatis Babeș-Bolyai Ambientum, 63(1), 49–59. https://doi.org/10.24193/subbambientum.2018.1.05