Lopes, Edson Batista, et al. “Etiology of Root and Stem Rot of Black Pepper (Piper Nigrum L.) and Its Ocurrence in Paraíba State, Brazil”. Pesquisa Agropecuaria Brasileira, vol. 13, no. 1, Apr. 2014, pp. 19-20, https://doi.org/10.1590/S1678-3921.pab1978.v13.16742.