The lower limit of latitude (U.S. sector) of northern quiet auroral arcs and its relation to Dst (H)
Akasofu, S. I., & Chapman, S. (1963). The lower limit of latitude (U.S. sector) of northern quiet auroral arcs and its relation to Dst (H). Journal Of Atmospheric And Terrestrial Physics, 25, 9-10. doi:10.1016/0021-9169(63)90011-4
