Is the number of days with lightning changing? A study for southeastern Europe of the period 1980–2018. Ann_UGAL_Math_Phys_Mec [Internet]. 28 juill. 2019 [cité 2 nov. 2026];42(1):85-9. Disponible sur: https://ojs.ugal.ro/index.php/math/article/view/2348