Cuchiara, C. C., Justo, P. S., Schmitz, J. D. e Bobrowski, V. L. (2015) “Pollen germination and viability of castor bean (Ricinus communis L.): culture medium composition and environmental conditions”, Científica. Dracena, SP, 43(1), p. 1–7. doi: 10.15361/1984-5529.2015v43n1p1-7.