MALUF, JAIME RICARDO TAVARES, et al. “CORN AGRO CLIMATIC ZONING BY SOWING DATES IN THE STATE OF RIO GRANDE DO SUL, BRAZIL ”. Pesquisa Agropecuária Gaúcha, vol. 6, no. 1, Aug. 2000, pp. 39-54, https://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/439.