TY - JOUR T1 - Ionosphere-magnetosphere coupling and field-aligned currents JO - Revista Brasileira de Ensino de FĂ­sica A1 - Oliveira, D. SN - 1806-1117 UL - 10.1590/S1806-11172014000100005 VL - 36 Y1 - 2014 PB - Brazil ER -