Styra D, Gaspariūnas J, Usovaite A. Peculiarities of hard cosmic radiation variations near the ground surface in accordance with geomagnetic activity changes. JEELM [Internet]. 2004Sep.30 [cited 2024Nov.23];12(3):96-102. Available from: https://btp.vgtu.lt/index.php/JEELM/article/view/8093