Brito, J. F., Büll, L. T., Beltrão, N. E., Rigon, J. P. G., & Sofiatti, V. (2014). Absorption and critical levels of phosphorus in castor bean shoots grown in different soil classes. Universidade Estadual de Londrina.

Brito, José Félix, Leonardo Theodoro Büll, Napoleão Esberard Beltrão, João Paulo Gonsiorkiewicz Rigon, và Valdinei Sofiatti. Absorption and Critical Levels of Phosphorus in Castor Bean Shoots Grown in Different Soil Classes. Universidade Estadual de Londrina, 2014.

Brito, José Félix, et al. Absorption and Critical Levels of Phosphorus in Castor Bean Shoots Grown in Different Soil Classes. Universidade Estadual de Londrina, 2014.