Lacava, Paulo Teixeira, et al. “Detection of Siderophores in Endophytic Bacteria <i>Methylobacterium< i> Spp. Associated With <i>Xylella fastidiosa< i> Subsp. <i>pauca< I>”;. Pesquisa Agropecuaria Brasileira, vol. 43, no. 4, Oct. 2008, pp. 521-8, doi:10.1590/S1678-3921.pab2008.v43.282.