Mikalauskienė, Renata, et al. “Study and Estimation of the Ratio of 137CS and 40K Specific Activities in Sandy and Loam Soils”. Mokslas – Lietuvos Ateitis Science – Future of Lithuania, vol. 3, no. 5, Dec. 2011, pp. 37-42, https://doi.org/10.3846/mla.2011.084.