Butkus, Donatas, and Ingrida Pliopaitė Bataitienė. 2006. “Investigation of Relationship Between Pine (Pinus Sylvestris L.) Biomass and 137CS Specific Activity in Wood”. Journal of Environmental Engineering and Landscape Management 14 (3):135-40. https://doi.org/10.3846/16486897.2006.9636890.