Mundstock, Claudio Mario, and Jeferson Zagonel. “Leaf Area Profile of Two Sunflower Cultivars under Different Rates and Timing of Nitrogen Application”. Pesquisa Agropecuaria Brasileira 29, no. 6 (June 1, 1994): 847–851. Accessed July 5, 2026. https://apct.sede.embrapa.br/pab/article/view/4124.