Correia, T. P. da S., de Sousa, S. F. G., Tavares, L. A. F., Silva, P. R. A., & Riquetti, N. B. (2015). Disk harrow operational performance in three engine rotation speeds. Científica, 43(3), 221–225. https://doi.org/10.15361/1984-5529.2015v43n3p221-225