Bottega, E. L., Queiroz, D. M. de, Pinto, F. de A. de C. and Santos, N. T. (2014) “The use of different sampling grids in determining the variability of soil physical attributes of a Oxisol”, Comunicata Scientiae, 5(2), pp. 131–139. doi: 10.14295/cs.v5i2.330.