Silva, Paulo Sérgio, Luiz Eduardo Santos, Vianney Oliveira, Roberto de Sousa, e Patrícia Lianny Fernandes. 2014. “Sample Size and Sampling Method for Evaluation of Characteristics of the Sunflower”. Revista Ciência Agronômica 46 (1). https://periodicos.ufc.br/revistacienciaagronomica/article/view/84554.