Pincheira, X.T., Batista, I.S., Abdu, M.A. y Richards, P.G. 2000. Negative phases at South-American stations during magnetic storms. Geofísica Internacional. 39, 1 (ene. 2000), 109–115. DOI:https://doi.org/10.22201/igeof.00167169p.2000.39.1.305.