Barbosa, Mauro Cezar, et al. “Agronomic Performance and Yield Components of Soybean Cultivars in Two Sowing Dates in the Region of Caiuá Sandstone”. Semina: Ciências Agrárias, vol. 34, no. 3, June 2013, pp. 945-60, doi:10.5433/1679-0359.2013v34n3p945.