Fleck, Nilson G., Paulo Regis E. da Silva, Carlos M. N. Machado, and Moacir A. Schiocchet. 2014. “Artificial Defoliation During Anthesis Stage in Sunflower”. Pesquisa Agropecuaria Brasileira 18 (4):371-79. https://doi.org/10.1590/S1678-3921.pab1983.v18.15243.