Villenave, Cecile, et al. “Impact of Direct Seeding Mulch-Based Cropping Systems on Soil Nematodes in a Long-Term Experiment in Madagascar”. Pesquisa Agropecuaria Brasileira, vol. 44, no. 8, Nov. 2010, pp. 949-53, doi:10.1590/S1678-3921.pab2009.v44.1308.