D. Baretta, Á. L. Mafra, J. C. P. Santos, C. V. T. do Amarante, and I. Bertol, “Multivariate analysis of soil fauna under different soil tillage and crop management systems”, PAB, vol. 41, no. 11, pp. 1675–1679, Nov. 2006, doi: 10.1590/S1678-3921.pab2006.v41.7331.