Pereira, Ailton Vitor, and Elainy B. C. Pereira. “Influence of Sizes of Polybags on Development of Hevea Planting Material”. Pesquisa Agropecuaria Brasileira, vol. 21, no. 9, Apr. 2014, pp. 945-8, https://doi.org/10.1590/S1678-3921.pab1986.v21.14954.