KILIFARSKA, N.; MOKREVA, A.; VELICHKOVA, T. North Atlantic Oscillation and Variations of Geomagnetic Field. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 75, n. 11, p. 1628–1637, 2022. DOI: 10.7546/CRABS.2022.11.10. Disponível em: https://proceedings.bas.bg/index.php/cr/article/view/200. Acesso em: 5 oct. 2026.