Fleck, Nilson Gilberto, Ildo Pedro Mengarda, and Jesus Juares Oliveira Pinto. “Weed Interference in Sunflower. Competition in Space”. Pesquisa Agropecuaria Brasileira 24, no. 9 (April 17, 2014): 1131–1137. Accessed July 6, 2026. https://apct.sede.embrapa.br/pab/article/view/16238.