Paiva, João Rodrigues de, Paulo de Souza Gonçalves, and Antonio Pessoa Rebello. 2014. “In Vitro Pollen Germination of Some Rubber Tree Clones. Preliminary Results”. Pesquisa Agropecuaria Brasileira 18 (9): 1021-29. https://doi.org/10.1590/S1678-3921.pab1983.v18.15415.