Andreoli, Claudinei. “Simplification of Viability Equation to Predict Seed Longevity of Corn and Soybean”. Pesquisa Agropecuaria Brasileira, vol. 39, no. 9, Sept. 2004, pp. 911-7, doi:10.1590/S1678-3921.pab2004.v39.6856.