Gonçalves, P. de S. et al. 1999. Phenotypic stability and genetic gains in six-year girth growth of <i>Hevea</i> clones. Pesquisa Agropecuaria Brasileira. 34, 7 (Jul. 1999), 1223–1232. DOI:https://doi.org/10.1590/S1678-3921.pab1999.v34.5311.