COLET, M. J., SVERZUT, C. B. and NETO, P. H. W. (2008) “SOIL SCARIFICATION EFFECT ON THE SOIL PENETRATION RESISTANCE IN GRASSLAND”, Revista Brasileira de Engenharia de Biossistemas. Tup, 2(2), pp. 119–128. doi: 10.18011/bioeng2008v2n2p119-128.