P. A. Bignelli, M. de M. Abdon, U. W. Palme, and J. dos S. V. da Silva, “Preliminary evaluation of ERS-1 data for studies on the Brazilian Pantanal”, PAB, vol. 33, no. 13, pp. 1691–1700, Dec. 1998, doi: 10.1590/S1678-3921.pab1998.v33.5051.