M. Abdu

Enhanced low-energy gamma rays at balloon altitude in the Brazilian magnetic anomaly

N. Trivedi, I. Martin, J. M. Costa, 1974, Nature.

The Brazilian scientific satellite

C. J. Zamlutti, D. C. Ceballos, H. Takahashi, 1994 .

ROCKET OBSERVATION OF EQUATORIAL PLASMA BUBBLES OVER NATAL, BRAZIL: EVIDENCE OF ELECTRON TEMPERA TURE ENHANCEMENT INSIDE BUBBLE

I. Batista, J. Sobral, P. MuraliKrishna, 1989 .