WERNER, R.; GUINEVA, V.; DESPIRAK, I.; LYUBCHICH, A.; BOJILOVA, R.; RAYKOVA, L.; ATANASSOV, A.; VALEV, D. Statistical Study of Geomagnetic Disturbances at European Auroral and High Latitudes. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 76, n. 4, p. 571–579, 2023. DOI: 10.7546/CRABS.2023.04.09. Disponível em: https://www.proceedings.bas.bg/index.php/cr/article/view/295. Acesso em: 18 mar. 2025.