Garbuglio, D. D., Gerage, A. C., Araújo, P. M. de, Junior, N. da S. F., & Shioga, P. S. (2007). Factor analysis and bissegmented regression for studies about environmental stratification and maize adaptability. Pesquisa Agropecuaria Brasileira, 42(2), 183–191. https://doi.org/10.1590/S1678-3921.pab2007.v42.7553