Possible role of auroral oval-related currents in two intense magnetic storms recorded by old mid-latitude observatories Clementinum and GreenwichFridrich Valach, Pavel Hejda, Miloš Revallo and Josef BochníčekJ. Space Weather Space Clim., 9 (2019) A11DOI: https://doi.org/10.1051/swsc/2019008
