Ioannidis, I., T. J. Mertzimekis, A. Godelitsas, K. C. Stamoulis, and K. G. Ioannides. “Chernobyl Still Affects the Environment of Greece: Recent Measurements of 137Cs in Soil Cores from Grevena–Trikala Area”. HNPS Advances in Nuclear Physics, vol. 21, Mar. 2019, pp. 182-4, doi:10.12681/hnps.2030.