Moreira, Adônis, Vicente Haroldo de Figueiredo Moraes, and César de Castro. 2006. “Sources and Rates of Boron in Rubber Rootstocks”. Pesquisa Agropecuaria Brasileira 41 (8):1291-98. https://doi.org/10.1590/S1678-3921.pab2006.v41.7279.