Pereira, Ailton Vitor, and Elainy Botelho Carvalho Pereira. “Evaluation of Rubber Nursery Planting Methods, by Direct Sowing in the Field, Without Seed Bed and Transplanting”. Pesquisa Agropecuaria Brasileira, vol. 33, no. 7, July 1998, pp. 1061-5, doi:10.1590/S1678-3921.pab1998.v33.4935.