Ioannidou, A., F. Groppi, M. L. Bonardi, S. Manenti, and L. Gini. “Activity Size Distribution of Radioactive Nuclide 7Be at Different Locations and under Different Meteorological Conditions”. HNPS Advances in Nuclear Physics, vol. 24, Apr. 2019, pp. 97-101, doi:10.12681/hnps.1850.