A. A. Otsubo, O. R. Brito, D. P. Passos, H. S. Araujo, F. M. Mercante, and V. H. N. Otsubo, “Forms of soil tillage and weed control in agronomic factors and production of cassava”, Semina: Ciênc. Agrár., vol. 33, no. 6, pp. 2241–2246, Dec. 2012.