Menezes, Dinah Mochel de, et al. “Influence of Planting and Harvest Time on Productivity of Sweet Potato Varieties in the Baixada Fluminense”. Pesquisa Agropecuaria Brasileira, vol. 9, no. 10, Apr. 2014, pp. 145-9, doi:10.1590/S1678-3921.pab1974.v9.17276.