@inproceedings{inproceedingsffc91f4d,
title   = {Time variation of the vertical magnetic cutoff rigidities over the South Atlantic Magnetic Anomaly},
author = {Frigo, Everton and Pacca, Igor Ivory Gil and Hartmann, Gelvam},
year = {2009},
publisher = {Sociedade Brasileira de Geofísica},
booktitle   = {International Congress of the Brazilian Geophysical Society}
}