SEMENOV, V. Y.; PETRISHCHEV, M. S. Variability of averaged annual impedances of the Earth and their spatial gradients in Europe. Geofizicheskiy Zhurnal, [S. l.], v. 34, n. 4, p. 245–252, 2012. DOI: 10.24028/gzh.0203-3100.v34i4.2012.116778. Disponível em: https://journals.uran.ua/geofizicheskiy/article/view/116778. Acesso em: 19 apr. 2024.