de Morais, Augusto Ramalho, and Vivaldo Francisco da Cruz. “Response Surface Model With Some Additional Auxiliary Variables”. Pesquisa Agropecuaria Brasileira 24, no. 6 (April 17, 2014): 635–645. Accessed July 10, 2026. https://apct.sede.embrapa.br/pab/article/view/15860.