Arsego, D. A., S. E. T. Ferraz, N. A. Streck, A. de O. Cardoso, and A. J. Zanon. “Study of the Impact of Different Indices Associated With El Niño Southern Oscillation on Soybean Yield in Rio Grande Do Sul”. Ciência E Natura, vol. 40, Mar. 2018, pp. 82-87, doi:10.5902/2179460X30684.