Fumis, Terezinha de Fátima, and José Figueiredo Pedras. “Proline, Diamine and Polyamines Accumulation in Wheat Cultivars Submitted to Water Deficits”. Pesquisa Agropecuaria Brasileira, vol. 37, no. 4, Apr. 2002, pp. 449-53, doi:10.1590/S1678-3921.pab2002.v37.6360.