Lemos Filho, J.P. de et al. 1994. Rubber tree (<i>Heyea</i> spp.) mini-grafting. II. Problems and technical advances. Pesquisa Agropecuaria Brasileira. 29, 5 (May 1994), 779–784. DOI:https://doi.org/10.1590/S1678-3921.pab1994.v29.4115.