Santos, Z.G. dos and Tupinambá, E.A. 2014. Manganese deficiency in cassava in Sergipe State, Brazil. Pesquisa Agropecuaria Brasileira. 17, 11 (Apr. 2014), 1541–1546. DOI:https://doi.org/10.1590/S1678-3921.pab1982.v17.16354.