D. G. Bonini Bitencourt, L. C. Timm, E. C. Guimarães, L. F. S. Pinto, E. A. Pauletto, e L. H. Penning, “Spatial variability structure of the surface layer attributes of gleysols from the coastal plain of Rio Grande do Sul ”, Biosci. J., vol. 31, nº 6, p. 1711–1721, nov. 2015.