R. P. de Oliveira, W. B. Scivittaro, and E. B. Radmann, “Quantification and method to select nucellar plants of Poncirus trifoliata”, PAB, vol. 38, no. 10, pp. 1173–1177, Oct. 2003, doi: 10.1590/S1678-3921.pab2003.v38.6687.