Pană, Radu Costin. “Is the Number of Days With Lightning Changing? A Study for Southeastern Europe of the Period 1980–2018”. Analele Universității ”Dunărea de Jos” din Galați. Fascicula II, Matematică, fizică, mecanică teoretică / Annals of the ”Dunarea de Jos” University of Galati. Fascicle II, Mathematics, Physics, Theoretical Mechanics 42, no. 1 (July 28, 2019): 85-89. Accessed July 3, 2024. https://gup.ugal.ro/ugaljournals/index.php/math/article/view/2348.