Styra, Dmitrijus, Jonas Gaspariūnas, and Ana Usovaite. “Peculiarities of Hard Cosmic Radiation Variations Near the Ground Surface in Accordance With Geomagnetic Activity Changes”. Journal of Environmental Engineering and Landscape Management 12, no. 3 (September 30, 2004): 96-102. Accessed December 21, 2024. https://transport.vilniustech.lt/index.php/JEELM/article/view/8093.