Zinkutė, Rimantė, Ričardas Taraškevičius, Saulius Gulbinskas, Žilvinas Stankevičius, and Margarita Jankauskaitė. 2015. “Variability of Estimated Contamination Extent Depending on Calculation Methods”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 2 (June): 337-43. https://doi.org/10.17770/etr2015vol2.234.