J. G. da Silva, J. Kluthcouski, L. F. Stone, H. Aidar, I. P. de Oliveira, and E. Ferreira, “Performance of sowing/fertilizing machines in the settlement of upland rice crop”, PAB, vol. 33, no. 1, pp. 63–70, Jan. 1998, doi: 10.1590/S1678-3921.pab1998.v33.4815.